而立 is read as じりつ (jiritsu) and means age 30.
じりつ
jiritsu
しりつ
municipal
private (establishment)
どくりつ
independence (e.g. of a nation)
けんりつ
prefectural
せつりつ
incorporation (of a business)
たいりつ
confrontation
せいりつ
being valid (of a theory, argument, etc.)
そうりつ
establishment
ふりつ
こくりつ
national
かくりつ
とりつ
metropolitan