あの姉妹はまったく似ていない。

あの姉妹はまったく似ていない。

The sisters are quite unlike.

あの姉妹(しまい)はまったく似(に)ていない。

Ano shimai wa mattaku niteinai.

彼の (あの、かの)

that (someone or something distant from both speaker and listener, or situation unfamiliar to both speaker and listener)

姉妹 (しまい、きょうだい)

sisters

は (は)

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

全く (まったく)

really; truly; entirely; completely; wholly; perfectly; indeed; good grief (expression of exasperation)

似る (にる)

to resemble; to look like; to take after; to be similar (in status, condition, etc.); to be close; to be alike; to be like

Readings: シ、あね、はは

Meaning: elder sister

Readings: マイ、いもうと

Meaning: younger sister

Readings: ジ、に.る、ひ.る

Meanings: becoming, resemble, counterfeit, imitate, suitable