今夜は大いに楽しもうよ。

今夜は大いに楽しもうよ。

Let's make a night of it.

今夜(こんや)は大(おお)いに楽(たの)しもうよ。

Kon'ya wa ōini tanoshimou yo.

今夜 (こんや)

this evening; tonight

は (は)

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

大いに (おおいに)

very; much; greatly; a lot of

楽しむ (たのしむ)

to enjoy (oneself)

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

Readings: コン、キン、いま

Meaning: now

Readings: ヤ、よ、よる

Meanings: night, evening

Readings: ダイ、タイ、おお-、おお.きい、 -おお.いに

Meanings: large, big

Readings: ガク、ラク、ゴウ、たの.しい、たの.しむ、この.む

Meanings: music, comfort, ease