skulking

(noun) evading duty or work by pretending to be incapacitated. Synonyms: malingering. Example: "They developed a test to detect malingering."

(verb) lie in wait, lie in ambush, behave in a sneaky and secretive manner. Synonyms: lurk, skulk.

(verb) avoid responsibilities and duties, e.g., by pretending to be ill. Synonyms: malinger, skulk.

(verb) move stealthily. Synonyms: skulk. Example: "The lonely man skulks down the main street all day."