名詞 optative:

1. a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs
   同義詞：optative mood

形容詞 optative:

1. indicating an option or wish
2. relating to a mood of verbs in some languages

op.ta.tive

adj.（形容詞）
Expressing a wish or choice.
希求的，祈望的：表達(dá)一種愿望或選擇的
Abbr. opt.Grammar
縮寫 opt.【語(yǔ)法】
Of, relating to, or being a mood of verbs in some languages, such as Greek, used to express a wish.
祈愿語(yǔ)氣動(dòng)詞的：與某些語(yǔ)言，如希臘語(yǔ)中的情感動(dòng)詞有關(guān)的，用來(lái)表達(dá)某種愿望
Designating a statement using a verb in the subjunctive mood to indicate a wish or desire, as inHad I the means, I would do it.
虛擬語(yǔ)氣動(dòng)詞的：在虛擬語(yǔ)氣中用動(dòng)詞表達(dá)陳述句，表明一種愿望或要求，如在Had I the means, I would do it. 中
n.Abbr. opt.Grammar （名詞）縮寫 opt.【語(yǔ)法】
The optative mood.
祈使語(yǔ)句
A verb or an expression in the optative mood.
祈使語(yǔ)氣動(dòng)詞或動(dòng)詞詞組

來(lái)源：
Middle English optatif
中古英語(yǔ) optatif
from Old French
源自 古法語(yǔ)
from Late Latin opt3tovus
源自 后期拉丁語(yǔ) opt3tovus
from Latin opt3tus [past participle of] opt3re [to wish]
源自 拉丁語(yǔ) opt3tus [] opt3re的過(guò)去分詞 [祈愿，希望]

【引伸】
op.tatively
adv.（副詞）