unblown (adj.)youdaoicibaDictYouDict[unblown 词源字典]
"not yet bloomed," 1580s, from un- (1) "not" + past participle of blow (v.2).
Life is the rose's hope while yet unblown;
The reading of an ever-changing tale;

[Keats, "Sleep and Poetry"]
[unblown etymology, unblown origin, 英语词源]