schnüffeln (ww):
boren(en) to inquire into something that does not concern one; to be nosy., naspeuren(en) act as a detective., ruiken(ru) вдыхать носом воздух с целью воспринять, обнаружить, распознать какой-либо запах., schaduwen(en) act as a detective., snuffelen(en) to rub or touch (someone or something) with the nose, face, etc., or an object., steken(en) to inquire into something that does not concern one; to be nosy.
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Via: Memodata.com