can opener

:  know, understand

:  to be able to do, make, or accomplish

:  to have knowledge or skill

:  a usually cylindrical receptacle:

:  a vessel for holding liquids

:  a drinking vessel

:  to put in a can :  preserve by sealing in airtight cans or jars

:  to hit (a golf shot) into the cup

:  to hit (a shot) in basketball

: canceled; cancellation

: cannon

: canto

:  one that opens : such as

:  cards of sufficient value for a player to open the betting in a poker game

:  the first item, contest, or event of a series