to feel unwell; to suffer pain; to be difficult to bear
难 · 10 strokes
Simplified from 難. Phonosemantic compound. 隹 represents the meaning and 堇 represents the sound. The character is based on the original meaning "type of bird", which is unrelated to the modern meaning.
受 · 8 strokes
Depicts a boat (舟) being passed from one hand (爫) to another hand (又). 舟 also served as phonetic, but it was later abbreviated.