彼は彼女が遅いのでいらいらした。

彼は彼女が遅いのでいらいらした。

He was irritated by her delay.

彼(かれ)は彼女(かのじょ)が遅(おそ)いのでいらいらした。

Kare wa kanojo ga osoi node irairashita.

彼 (かれ)

he; him; his; boyfriend

は (は)

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

彼女 (かのじょ)

she; her; her; girlfriend; sweetheart

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

遅い (おそい)

slow; late (e.g. "late at night"); too late; dull; stupid

ので (ので、んで)

that being the case; because of ...; the reason is ....; given that...

苛々 (いらいら、イライラ)

getting nervous; irritation

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ジョ、ニョ、ニョウ、おんな、め

Meanings: woman, female

Readings: チ、おく.れる、おく.らす、おそ.い

Meanings: slow, late, back, later