Verb (5-dan, く, transitive)
1.  to untie;  to unfasten;  to unwrap;  to undo;  to unbind;  to unpack
2.  to unsew;  to unstitch
3.  to solve;  to work out;  to answer
4.  to dispel (misunderstanding, etc.);  to clear up;  to remove (suspicion);  to appease
5.  to dissolve (a contract);  to cancel;  to remove (a prohibition);  to lift (a ban);  to raise (a siege)
6.  to release (from duty);  to relieve;  to dismiss
7.  to comb (out);  to card;  to untangle (hair)