noun:

• one lump; one group

noun:

• one matter; one case
• physical intimacy; sexual intercourse

noun:

• dying; laying down one's life
• one out - Baseball term

noun:

• walking wherever one's legs lead one; wandering

expression / noun:

• one's whole heart; everything one feels

noun:

• (only) one option (game slang); one possible choice - slang

noun:

• one rank; one grade

noun:

• one litter; one clutch (e.g. eggs)

expression / noun:

• one's younger days; when one was young

noun:

• One Belt, One Road (Chinese development strategy); OBOR

noun:

• seeking one's own interests; straining (the interpretation or argument) to suit one's own interests; drawing water for one's own field - four character idiom

expression / ichidan verb:

• to have luck on one's side; to get lucky ➜ 芽が出る【めがでる】
• to have one's eyes bulge out of one's head (with surprise) ➜ 目の玉が飛び出る

godan ~る verb:

• to become decrepit; to be in one's dotage; to become dull; to lose one's astuteness; to lose one's touch; to become senile; to lose one's edge; to go downhill

adverbial noun:

• one turn; one round
• (a) size

~する noun:

• to go around; to make a circuit; to take a turn

adverbial noun:

• twelve years; one cycle of the Chinese zodiac

noun / ~する noun:

• personal combat; one-to-one fight

noun:

• one's relationships; people one knows; circle of friends - four character idiom

noun / ~する noun:

• transferring from one college (or one department) to another

adjectival noun / noun:

• doing as one pleases; following one's nose

noun:

• free service after one has finished one's apprenticeship ➜ お礼奉公

noun:

• one pole (esp. used for fishing poles); one rod

noun:

• the journey before one; distance one has to travel

noun:

• person one respects second only to one's father - archaism

noun:

• children's game in which one skips on one leg

noun:

• (one) line; (one) row

noun:

• one machine; one vehicle