たろう

Compound of たら (tara-, 未(み)然(ぜん)形(けい) (mizenkei) of たり (tari, perfective auxiliary verb, whence modern past tense suffix た (-ta))) + う (u, conjectural suffix), with a regular /au/ → /oː/ vowel shift. A synchronic analysis may view this a contraction of た (-ta, past tense suffix) + だろう (darō, conjectural form of copula だ (da)).

たろう • (-tarō) ^{←たらう (-tarau)?}

1. shows conjecture about a past or completed action ("Wasn't it [...]?", "Didn't I [...]?")

   言(い)ったろう？

   Ittarō?

   Didn't I tell you so?

• Takes the form だろう (darō) following -bu, -gu, -mu, and -nu godan verbs.

たろう • (tarō) 

1. タロウ: tallow

たろう • (Tarō) 

1. 太郎, 多朗, 多郎, 大郎, 太良, 太朗, タロウ: a male given name