lurk
verb
[ ləːk ]
• be or remain hidden so as to wait in ambush for someone or something.
• "a ruthless killer still lurked in the darkness"
Similar:
skulk,
loiter,
lie in wait,
lie low,
hide,
conceal oneself,
take cover,
keep out of sight,
sneak,
sidle,
slink,
prowl,
steal,
move furtively,
move with stealth,
lurk
noun
• a profitable stratagem; a dodge or scheme.
• "you'll soon learn the lurks and perks"
Origin:
Middle English: perhaps from lower3 + the frequentative suffix -k (as in talk ). The noun is from British slang lurk ‘method of fraud’.