1To become physically or mentally fatigued and feel the need to rest.
長時間立ち仕事をして足が疲れた。
I stood at work for a long time and my legs got tired.
満員電車での通勤に毎日疲れている。
I get tired every day from commuting on a packed train.
今日は特に何もしていないのに、なぜかとても疲れる。
I haven't really done anything today, but for some reason I feel very tired.
試験勉強で疲れた頭を休ませるため、少し散歩した。
I went for a short walk to rest my mind, which was tired from studying for exams.
2For a frequently used or aging object to lose its good condition or function; to become worn out.
このスプリングは疲れてしまって、もう弾力がない。
This spring has become worn out and no longer has any bounce.
何年も使ったキーボードは、キーの反応が疲れてきた気がする。
This keyboard I've used for years feels like its keys have worn out and become less responsive.
3An archaic sense meaning to starve or become weak from hunger; rarely used in modern Japanese.