kill two birds with one stone, do one task and finish two or more goals (literally, “one stone, two birds”)

(obsolete) being surprised twice / (obsolete) more specifically, describes the appearance of a woman who has a beautiful figure from behind but has an ugly face

Kyūjitai form of 三位一体 (“Trinity”)

Alternative form of 十二単

(Christianity) the Trinity

a journey of a thousand miles begins with a single step

an anthology of one hundred poems by one hundred poets, one poet for each poem

short for 小倉百人一首 (Ogura Hyakunin Isshu): a famous "one hundred poems anthology", used as the basis of certain card games

Synonym of 亜酸化窒素 (asanka chisso, “nitrous oxide”); dinitrogen monoxide

Clipping of 一千一夜物語 (Issen'ichiya Monogatari, “One Thousand and One Nights”).