"opener" in the noun sense
the first event in a series
"she played Chopin for her opener"
"the season's opener was a game against the Yankees"
2. undoer, opener, unfastener, untier
a person who unfastens or unwraps or opens
"children are talented undoers of their shoelaces"
a hand tool used for opening sealed containers (bottles or cans)
Source: WordNet® (An amazing lexical database of English)
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