若い時は、一度しかない。

若い時は、一度しかない。

You are only young once.

若(わか)い時(とき)は、一(いち)度(ど)しかない。

Wakai toki wa, ichi do shika nai.

若い (わかい)

young; youthful; immature; green; low (number); small

時 (とき)

time; hour; moment; occasion; case; chance; opportunity; season; the times; the age; the day; tense

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

一 (いち)

one; best; first; foremost; beginning; start; bottom string (on a shamisen, etc.)

度 (ど)

degree (angle, temperature, scale, etc.); counter for occurrences and times; strength (of alcohol)

しか (しか)

only; nothing but

ない (ない)

not; emphatic suffix

Readings: ジャク、ニャク、ニャ、わか.い、わか-、も.しくわ、も.し、も.しくは、ごと.し

Meanings: young, if, perhaps, possibly, low number, immature

Readings: ジ、とき、 -どき

Meanings: time, hour

Readings: イチ、イツ、ひと-、ひと.つ

Meanings: one, one radical (no.1)

Readings: ド、ト、タク、たび、 -た.い

Meanings: degrees, occurrence, time, counter for occurrences, consider, attitude