辛い

1. i-adjective spicy; hot
2. salty
3. harsh (criticism); severe (punishment); strict
4. painful; bitter; difficult; tough

つらい

1. i-adjective, usually in kana painful; bitter; heart-breaking; difficult (emotionally)
2. usually in kana tough; difficult; hard (usu. of situations)
3. usually in kana cruel; harsh; cold

づらい · ずらい

1. suffix, i-adjective, usually in kana, after -masu stem of a verb difficult to ... (physically or emotionally); hard to ...