一

ひと ひ ひい いち いっち イー

one

一軒一軒

いっけんいっけん いちけんいちけん

house to house, door to door

一言一行

いちげんいっこう

every word and act, just a word or an act

一進一退

いっしんいったい

now advancing and now retreating, ebb and flow, seesawing, taking alternately favorable and unfavorable turns

一日一夜

いちにちいちや

all day and night

一国一票

いっこくいっぴょう いちこくいちひょう

one vote per nation

一利一害

いちりいちがい

advantages and disadvantages, gain some, lose some

一朝一夕

いっちょういっせき

in a day, in a brief space of time

一世一代

いっせいちだい いっせいいちだい

once in a lifetime, the first and last occurrence (event, experience) of one's lifetime

一得一失

いっとくいっしつ

gaining some and losing some, (something having its) advantages and disadvantages

一張一弛

いっちょういっし

tension and relaxation

一汁一菜

いちじゅういっさい

one-plate meal, simple meal, austerity diet

一挙一動

いっきょいちどう

one's every action, every single move

一期一会

いちごいちえ

once-in-a-lifetime encounter (hence should be cherished as such)

一糸一毫

いっしいちごう

tiny amount

一宿一飯

いっしゅくいっぱん

(being beholden to someone for a favor of) a night's lodging and a meal

一問一答

いちもんいっとう

answering question by question

一長一短

いっちょういったん

(something having its) merits and demerits, advantages and disadvantages, good points and shortcomings

一人一人

ひとりひとり ひとりびとり

one by one, each, one at a time