彼は冷静ですね。

彼は冷静ですね。

He is cool, isn't he?

彼(かれ)は冷静(れいせい)ですね。

Kare wa reisei desu ne.

彼 (かれ)

he; him; his; boyfriend

は (は)

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

冷静 (れいせい)

calm; composure; coolness; serenity

です (です)

be; is

ね (ね、ねえ)

indicates emphasis, agreement, request for confirmation, etc.; is it so; hey; come on; listen; not

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: レイ、つめ.たい、ひ.える、ひ.や、ひ.ややか、ひ.やす、ひ.やかす、さ.める、さ.ます

Meanings: cool, cold (beer, person), chill

Readings: セイ、ジョウ、しず-、しず.か、しず.まる、しず.める

Meaning: quiet