| erode |
| gnaw |
| wear away |
| eat at |
| 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) |
| attack(verb, upset, trouble, bother, disturb) |
| bedevil(verb, upset, trouble, bother, disturb) |
| beleaguer(verb, upset, trouble, bother, disturb) |
| beset(verb, upset, trouble, bother, disturb) |
| 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) |
| depress(verb, upset, trouble, bother, disturb) |
| despair(verb, upset, trouble, bother, disturb) |