| regret |
| afflict(verb, upset, trouble, bother, disturb) |
| aggrieve(verb, upset, trouble, bother, disturb) |
| agonize(verb, upset, trouble, bother, disturb) |
| ail(verb, upset, trouble, bother, disturb) |
| annoy(verb, upset, trouble, bother, disturb) |
| apologize(verb, grieve, lament, deplore, bemoan) |
| attack(verb, upset, trouble, bother, disturb) |
| be disturbed(verb, grieve, lament, deplore, apologize) |
| be sorry for(verb, grieve, lament, deplore, apologize) |
| bedevil(verb, upset, trouble, bother, disturb) |
| beleaguer(verb, upset, trouble, bother, disturb) |
| bemoan(verb, grieve, lament, deplore, apologize) |
| beset(verb, upset, trouble, bother, disturb) |
| bewail(verb, grieve, lament, deplore, apologize) |
| bother(verb, upset, trouble, disturb, fuss) |
| brood(verb, upset, trouble, bother, disturb) |
| bug(verb, upset, trouble, bother, disturb) |
| chafe(verb, upset, trouble, bother, disturb) |
| concern oneself(verb, expression, upset, trouble, bother) |