
1) Be anxious; fret 2) Burden with anxiety 3) Disorder 4) Disquiet 5) Distract 6) Disturb 7) Perturb 8) Trouble 9) Unhinge 10) Upset 11) Vex; fret
Found on
https://www.crosswordclues.com/clue/cark

1) Fret 2) Perturb 3) Unhinge
Found on
https://www.crosswordclues.com/clue/cark

• (v. t.) To vex; to worry; to make by anxious care or worry. • (v. i.) To be careful, anxious, solicitous, or troubles in mind; to worry or grieve. • (n.) A noxious or corroding care; solicitude; worry.
Found on
http://thinkexist.com/dictionary/meaning/cark/
Cark (kärk)
noun [ Middle English
cark , from a dialectic form of French
charge ; confer W.
carc anxiety, care, Arm
karg charge, burden. See
Charge , and confer
Cargo .] A noxious or corroding care; solicitude; worry. [ Archaic.] « His heavy head, devo...
Found on
http://www.encyclo.co.uk/webster/C/26
Cark transitive verb To vex; to worry; to make by anxious care or worry. [ R.] « Nor can a man, independently . . . of God's blessing, care and
cark himself one penny richer.
South. »
Found on
http://www.encyclo.co.uk/webster/C/26

Cark is Australian slang for to break down; die.
Found on
http://www.probertencyclopaedia.com/browse/ZC.HTM
No exact match found.