彼の記憶力は年のせいで衰えてきている。

Sentence Analyzer

記憶力 せい 衰えてきている

English Translation

His memory has been decaying because of age.

Furigana

(かれ)記憶力(きおくりょく)(とし)のせいで(おとろ)えてきている。

Romanji

Kare no kiokuryoku wa toshi no sei de otoroetekiteiru.

Words

(かれ)
he; him; his; boyfriend
()
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
記憶力 (きおくりょく)
memory
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
(とし)
year; many years; age; past one's prime; old age
所為 (せい、せえ)
consequence; outcome; result; blame
(で、にて)
indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.
衰える (おとろえる)
to become weak; to decline; to wear; to abate; to decay; to wither; to waste away

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: キ、 しる.す
Meanings: scribe, account, narrative
Reading: オク
Meanings: recollection, think, remember
Readings: リョク、 リキ、 リイ、 ちから
Meanings: power, strength, strong, strain, bear up, exert
Readings: ネン、 とし
Meanings: year, counter for years
Readings: スイ、 おとろ.える
Meanings: decline, wane, weaken