あいつは無鉄砲な男だ。

あいつは無鉄砲な男だ。

He is a daredevil.

あいつは無鉄砲(むてっぽう)な男(おとこ)だ。

Aitsu wa muteppōna otoko da.

彼奴 (あいつ、きゃつ、かやつ、あやつ)

he; she; that guy

は (は)

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

無鉄砲 (むてっぽう)

rash; reckless

男 (おとこ、おっこ)

man; male; fellow; guy; chap; bloke; male lover; boyfriend; man; manliness; manly honor; manly honour; manly reputation

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: ム、ブ、な.い

Meanings: nothingness, none, ain't, nothing, nil, not

Readings: テツ、くろがね

Meaning: iron

Reading: ホウ

Meanings: cannon, gun

Readings: ダン、ナン、おとこ、お

Meaning: male