若さは永遠ではないということを忘れてはならない。
Sentence Analyzer
English Translation
Keep in mind that youth is not eternal.
Furigana
Romanji
Wakasa wa eien de wa nai toiu koto o wasurete wanaranai.
Words
若い
(わかい)
young; youthful; immature; green; low (number); small
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
永遠
(えいえん)
eternity; perpetuity; immortality; permanence
で
(で、にて)
indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.
ない
(ない)
not; emphatic suffix
と言う
(という、とゆう)
called; named; as many as; as much as; all X; every X
事
(こと、こん)
thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
を
(を)
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
忘れる
(わすれる)
to forget; to leave carelessly; to be forgetful of; to forget about; to forget (an article)
ば
(ば)
if ... then; when; and; why don't you...?; the more (one does something); because; since