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demonstrate: demonstrate: see monster
frustrate: frustrate: [15] Frustrate comes from Latin frūstrātus ‘disappointed, frustrated’, the past participle of a verb formed from the adverb frūstrā ‘in error, in vain, uselessly’. This was a relative of Latin fraus, which originally meant ‘injury, harm’, hence ‘deceit’ and then ‘error’ (its English descendant, fraud [14], preserves ‘deceit’). Both go back to an original Indo- European *dhreu- which denoted ‘injure’.
=> fraud
illustrate: illustrate: [16] Illustrate is closely related etymologically to illuminate. It goes back to Latin illustrāre, a compound verb formed from the prefix in- and lustrāre ‘make bright’, which came from the same base as produced Latin lūmen (source of illuminate) and lūx ‘light’, and indeed English light. Originally it meant literally ‘throw light on’, but this eventually passed via ‘elucidate’ to, in the 17th century, ‘exemplify’ and ‘add pictures to’.

More of the original sense of ‘brightness’ survives, albeit metaphorically, in illustrious [16], which comes from Latin illustris ‘shining, clear’, a back-formation from illustrāre.
=> illuminate, illustrious, light, luminous, lustre
magistrate: magistrate: [14] By far the most widely used contributions of Latin magister ‘master’ to English are the heavily disguised master and mister, but more obvious derivatives have made the trip too. The late Latin adjective magisterius ‘of a master’, modified through medieval Latin magisteriālis, has given us magisterial [17]; and magistrātus, source of English magistrate, denoted a ‘state official’ in ancient Rome.
=> master, mister
prostrate: prostrate: see strata
remonstrate: remonstrate: see monster
strategy: strategy: [17] Etymologically, strategy denotes ‘leading an army’. It comes ultimately from Greek stratēgós ‘commander-in-chief, general’, a compound noun formed from stratós ‘army’ and ágein ‘lead’ (a relative of English act, agent, etc). From it was formed stratēgíā ‘generalship’, which reached English via French stratégie. Another derivative was stratēgeīn ‘be a general’, which in turn spawned stratégēma ‘act of a general’. This passed via Latin stratēgēma and French stratagème into English as stratagem [15].
administrate (v.): 1630s, from Latin administratus, past participle of administrare (see administer). In modern use a back-formation from administration. Related: Administrated; administrating.
castrate (v.): 1610s (implied in castrated), back-formation from castration (q.v.), or from Latin castratus, past participle of castrare. The figurative sense is attested earlier (1550s). Related: Castrating.
demonstrate (v.): 1550s, "to point out," from Latin demonstratus, past participle of demonstrare (see demonstration). Meaning "to point out by argument or deduction" is from 1570s. Related: Demonstrated; demonstrating.
flustrated (adj.): 1712, jocular formation from fluster (v.) + frustrated. Related: Flustration.
frustrate (v.): mid-15c., from Latin frustratus, past participle of frustrari "to deceive, disappoint, make vain," from frustra (adv.) "in vain, in error," related to fraus "injury, harm" (see fraud). Related: Frustrated; frustrating.
frustrated (adj.): "disappointed," 1640s, past participle adjective from frustrate.
illustrate (v.): 1520s, "light up, shed light on;" 1610s, "educate by means of examples," back-formation from illustration, and in some cases from Latin illustratus, past participle of illustrare (see illustration). Sense of "provide pictures to explain or decorate" is 1630s. Related: Illustrated; illustrating.
magistrate (n.): late 14c., "civil officer in charge of administering laws," from Old French magistrat, from Latin magistratus "a magistrate, public functionary," originally "magisterial rank or office," from magistrare "serve as a magistrate," from magister "chief, director" (see master). Related: Magistracy.
orchestrate (v.): "to compose or arrange (music) for an orchestra," 1855, back-formation from orchestration. The figurative sense is attested from 1883. Related: Orchestrated; orchestrating.
prostrate (adj.): mid-14c., "lying face-down" (in submission, worship, etc.), from Latin prostratus, past participle of prosternere "strew in front, throw down," from pro- "forth" (see pro-) + sternere "to spread out," from PIE root *stere- "to spread, extend, stretch out" (see structure (n.)). Figurative use from 1590s. General sense of "laid out, knocked flat" is from 1670s.
prostrate (v.): early 15c., prostraten, "prostrate oneself," from prostrate (adj.). Related: Prostrated; prostrating.
remonstrate (v.): 1590s, "make plain," back-formation from remonstration, or else from Medieval Latin remonstratus, past participle of remonstrare "to demonstrate" (see remonstrance). Meaning "to exhibit or present strong reasons against" is from 1690s. Related: Remonstrated; remonstrating.
strategic (adj.): "pertaining to strategy, characterized by strategy," 1807, from French stratégique and directly from Greek strategikos in classical use "of or for a general; fitted for command," from strategos (see strategy). Related: Strategical; strategically (1810).
strategist (n.): 1838, from French stratégiste, from stratégie (see strategy).
strategize (v.): 1874, from strategy + -ize. Related: Strategized; strategizing.
strategy (n.): 1810, "art of a general," from French stratégie (18c.) and directly from Greek strategia "office or command of a general," from strategos "general, commander of an army," also the title of various civil officials and magistrates, from stratos "multitude, army, expedition, encamped army," literally "that which is spread out" (see structure (n.)) + agos "leader," from agein "to lead" (see act (n.)). In non-military use from 1887.
substrate (n.): 1810, from Modern Latin substratum (see substratum).
defenestrate: "Throw (someone) out of a window", Early 17th century (as defenestrated): see defenestration.
sequestrate: "Take legal possession of (assets) until a debt has been paid or other claims have been met", Late Middle English (in the sense 'separate from general access'): from late Latin sequestrat- 'given up for safekeeping', from the verb sequestrare (see sequester).