grandiosity (n.)youdaoicibaDictYouDict[grandiosity 词源字典]
1814, from French grandiosité; see grandiose + -ity.
The author now and then makes a word for his own use, as complicate, for complicated; and, still less fortunately 'grandiosity' (p. 343). [review of Joseph Forsyth's "Remarks on Italy," "Edinburgh Review," January 1814]
[grandiosity etymology, grandiosity origin, 英语词源]
now (adv.)youdaoicibaDictYouDict
Old English nu "now, at present, immediately; now that," also used as an interjection and as an introductory word; common Germanic (Old Norse nu, Dutch nu, Old Frisian nu, German nun, Gothic nu "now"), from PIE *nu "now" (cognates: Sanskrit and Avestan nu, Old Persian nuram, Hittite nuwa, Greek nu, nun, Latin nunc, Old Church Slavonic nyne, Lithuanian nu, Old Irish nu-). Perhaps originally "newly, recently," and related to the root of new.

Often merely emphatic; non-temporal usage (as in Now, then) was in Old English. The adjective meaning "up to date" first recorded 1967, but the word was used also as an adjective in Middle English with the sense "current" from late 14c. Now and then "occasionally" is from 1530s; now or never attested from 1550s.
occasional (adj.)youdaoicibaDictYouDict
late 14c., "occurring now and then," from occasion (n.) + -al (1). Meaning "casual" is 1560s. Meaning "happening on or pertaining to a particular occasion" is from 1630s. Of furniture, etc., from 1749.
sometimes (adv.)youdaoicibaDictYouDict
"now and then," 1520s, from sometime + adverbial genitive -s.
then (adv.)youdaoicibaDictYouDict
adverb of time, Old English þanne, þænne, þonne, from Proto-Germanic *thana- (cognates: Old Frisian thenne, Old Saxon thanna, Dutch dan, Old High German danne, German dann), from PIE demonstrative pronoun root *to- (see the).

As a conjunction, "in that case, therefore," in Old English. As an adjective, "being at that time," from 1580s. As a noun from early 14c. For further sense development, see than. Similar evolutions in other Germanic languages; Dutch uses dan in both senses, but German has dann (adv.) "then," denn (conj.) "than." Now and then "at various times" is attested from 1550s; earlier then and then (c. 1200).