苦手
にがて poor (at); weak (in)
Why it means this
苦 (bitter, painful) + 手 (a hand — one's opponent, or one's skill) — from an old belief in a 'bitter hand' whose touch made one ill; something one is bad at or dislikes dealing with (数学が苦手; 苦手なタイプ).
Breakdown
Each character links to its full entry — origin story, stroke order, and readings.