English → French
painful /BrE ˈpeɪnfʊl, 
ˈpeɪnf(ə)l, AmE ˈpeɪnfəl /
adjective
1 (injury, swelling etc) douloureux/douloureuse; [lesson, memory, reminder] pénible, [blow] dur
it was painful to watch c'était pénible à regarder
it was too painful to bear c'était trop dur or
2 (laborious) [progress, task] pénible
3 (bad) [display, performance] lamentable