problem [v]
- grübeln
- sich Gedanken machen
feelings [v]
- sich grämen
- sich sorgen

problem [v]
- se faire du mauvais sang
- ruminer
feelings [v]
- se faire du mauvais sang

problem [v]
- preoccuparsi
- prendersela
- impensierirsi
- inquietarsi
- crucciarsi
feelings [v]
- darsi pensiero

problem [v]
- preocuparse
- atormentarse
- inquietarse
- apurarse
- angustiarse
feelings [v]
- atormentarse
- hacerse mala sangre [informal]

problem [v]
- tobben
- piekeren
feelings [v]
- zich ergeren
- zich opvreten

problem [v]
- grubbla
- ruva på
feelings [v]
- gräma sig
- reta upp sig

problem [v]
- ficar preocupado
- cismar
feelings [v]
- atormentar
- aborrecer

erosion [n]
- corrosion
- gnawing
agitation [n]
- annoyance
- harassment
- irritation
- vexation
- worry
ornamental pattern [n]
rage [v]
- fume
- worry
annoy [v]
- gall
- chafe
- goad
- harass
- irritate
- needle
- nettle
erode [v]
- corrode
- gnaw
- rust
- wear away

Present participle; Past participle
- fretting
- fretted
Present
- fret
- fret
- frets
- fret
- fret
- fret
Past
- fretted
- fretted
- fretted
- fretted
- fretted
- fretted
Future
- will fret
- will fret
- will fret
- will fret
- will fret
- will fret
Present conditional
- would fret
- would fret
- would fret
- would fret
- would fret
- would fret
Present Perfect
- have fretted
- have fretted
- has fretted
- have fretted
- have fretted
- have fretted
Past Perfect
- had fretted
- had fretted
- had fretted
- had fretted
- had fretted
- had fretted
Future Perfect
- will have fretted
- will have fretted
- will have fretted
- will have fretted
- will have fretted
- will have fretted
Past conditional
- would have fretted
- would have fretted
- would have fretted
- would have fretted
- would have fretted
- would have fretted
Imperative
- -
- fret
- -
- -
- -
- -