行かん [いかん] /(exp) (1) (uk) not going (well)/not proceeding (as one wishes)/(exp) (2) (uk) bad/not good/(exp) (3) (See いけない・4) (uk) hopeless/beyond hope/(exp) (4) (after the -te form of a verb or adjective) (See いけない・2) (uk) must not (do, be)/should not/ought not to/EntL2829697/