sticker

definition: a short knife with a pointed blade used for piercing or stabbing
example:
speech part: noun
synonyms: dagger
definition: a particularly difficult or baffling question or problem
example:
speech part: noun
synonyms: poser stumper toughie
definition: an adhesive label
example:
speech part: noun
synonyms: gummed label paster
definition: a small sharp-pointed tip resembling a spike on a stem or leaf
example:
speech part: noun
synonyms: spine

sticker is explained and pronounced

How sticker is being used?