そんなふうに言うなんて卑怯だ。

そんなふうに言うなんて卑怯だ。

It's mean of you to talk that way.

そんなふうに言(い)うなんて卑怯(ひきょう)だ。

Sonnafūni iu nante hikyō da.

そんな風に (そんなふうに)

in that manner; like that

言う (いう、ゆう)

to say; to utter; to declare; to name; to call; to go (e.g. "the alarm went ping"); to make a noise

なんて (なんて)

such as; (things) like; exclamation

卑怯 (ひきょう)

cowardice; meanness; unfairness

だ (だ)

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

Readings: ゲン、ゴン、い.う、こと

Meanings: say, word

Readings: ヒ、いや.しい、いや.しむ、いや.しめる

Meanings: lowly, base, vile, vulgar

Readings: キョウ、コウ、ひる.む、おびえ.る、おじる、おび.える、おそ.れる

Meanings: cowardice, wince, flinch, hesitate, waver