noun:

• conjugation (inflection, declension) of ichidan verbs ending in "iru" - abbreviation ➜ 上一段活用

noun:

• female ninja
• woman - colloquialism

noun:

• first-year student of an elementary school

noun:

• safety first

noun:

• (wearing only) a pair of underpants - slang - abbreviation ➜ パンツ一丁

noun:

• having only tiles of one suit and no honor tiles (yaku) - Mahjong term - From Chinese ➜ 清一色

noun / ~の noun:

• the greatest of the day - four character idiom

noun / ~する noun:

• unification; union; oneness

noun:

• at the outset; at the very beginning; in the first place; to begin (start) with; first and foremost - four character idiom

noun / ~の noun:

• the best in the land; the best of its kind in the country; par excellence in the whole country - four character idiom

noun:

• First Epistle to the Corinthians (book of the Bible)