疲つかれやすい

つ

か

れ

や

す

い

Meanings

1

i-adjective

tiring easily; easy to tire

Describes a person or body part that becomes fatigued quickly.

疲つかれる
疲れる is the base verb 'to get tired', while 疲れやすい is an adjective meaning 'prone to tiring'.
やすい
やすい is a suffix meaning 'easy to do', attached to the masu-stem of verbs. 疲れやすい is a lexicalized adjective form.

Compound of the masu-stem of 疲れる (tsukareru, 'to get tired') + やすい (yasui, 'easy to do').