妹は心ゆくまで笑った。
Sentence Analyzer
English Translation
My sister laughed to her heart's content.
Furigana
Romanji
Imōto wa kokoroyuku made waratta.
Words
妹
(いもうと)
younger sister
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
迄
(まで)
until (a time); till; to; up to; to (a place); as far as; to (an extent); up to; so far as; even; only; merely
笑う
(わらう)
to laugh; to smile; to sneer; to ridicule; to be dumbfounded; to be flabbergasted