daisy (n.)youdaoicibaDictYouDict[daisy 词源字典]
Old English dægesege, from dæges eage "day's eye," because the petals open at dawn and close at dusk. (See day (n.) + eye (n.)). In Medieval Latin it was solis oculus "sun's eye." As a female proper name said to have been originally a pet form of Margaret (q.v.).

Daisy-cutter first attested 1791, originally of horses that trot with low steps; later of cricket (1889) and baseball hits that skim along the ground. Daisy-chain in the "group sex" sense is attested from 1941. Pushing up daisies "dead" is attested from 1918, but variants with the same meaning go back to 1842.[daisy etymology, daisy origin, 英语词源]
primrose (n.)youdaoicibaDictYouDict
late 14c., prymrose, from Old French primerose, primerole (12c.) and directly from Medieval Latin prima rosa, literally "first rose," so called because it blooms early in spring (see prime (adj.)). As the name of a pale yellow color, by 1844.

Parallel name primula (c. 1100) is from Old French primerole, from Medieval Latin primula "primrose," shortened from primula veris "firstling of spring," thus properly fem. of Latin primulus, diminutive of primus; but primerole was used in Old French and Middle English of other flowers (cowslips, field daisies). The primrose path is from "Hamlet" I, iii.
push (v.)youdaoicibaDictYouDict
early 14c., from Old French poulser (Modern French pousser), from Latin pulsare "to beat, strike, push," frequentative of pellere (past participle pulsus) "to push, drive, beat" (see pulse (n.1)). Meaning "promote" is from 1714; meaning "approach a certain age" is from 1937. For palatization of -s-, OED compares brush (n.1); quash. Related: Pushed; pushing.
"Pushing up the daisies now," said a soldier of his dead comrade. ["The American Florist," vol. XLVIII, No. 1504, March 31, 1917]
To push (someone) around is from 1923. To push (one's) luck is from 1754. To push the envelope in figurative sense is late 1980s. To push up daisies "be dead and buried" is from World War I.
dicotyledonyoudaoicibaDictYouDict
"A flowering plant with an embryo that bears two cotyledons (seed leaves). Dicotyledons constitute the larger of the two great divisions of flowering plants, and typically have broad stalked leaves with net-like veins (e.g. daisies, hawthorns, oaks)", Early 18th century: from modern Latin dicotyledones (plural), from di- 'two' + cotyledon (see cotyledon).