彼は思う存分楽しんでいた。

彼は思う存分楽しんでいた。

He was enjoying himself to his heart's content.

彼(かれ)は思(おも)う存分(ぞんぶん)楽(たの)しんでいた。

Kare wa omouzonbun tanoshindeita.

彼 (かれ)

he; him; his; boyfriend

は (は)

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

思う存分 (おもうぞんぶん)

to one's heart's content

楽しむ (たのしむ)

to enjoy (oneself)

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: シ、おも.う、おもえら.く、おぼ.す

Meaning: think

Readings: ソン、ゾン、ながら.える、あ.る、たも.つ、と.う

Meanings: exist, suppose, be aware of, believe, feel

Readings: ブン、フン、ブ、わ.ける、わ.け、わ.かれる、わ.かる、わ.かつ

Meanings: part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100

Readings: ガク、ラク、ゴウ、たの.しい、たの.しむ、この.む

Meanings: music, comfort, ease