gnaw at

annoy bother depress disturb fret irritate perturb plague trouble try unsettle upset

afflict aggrieve agonize ail attack bedevil beleaguer beset brood bug chafe despair disquiet distress dun goad harass harry hassle hector importune needle oppress persecute pester stew tantalize tear tease test torment torture vex wince writhe wrong

bite one's nails concern oneself feel uneasy go for have qualms sweat out take on

aid appease assist calm comfort delight help make happy order pacify please soothe

not worry support

reassure