Jack. I have lost both my parents. Lady Bracknell. To lose one parent, Mr. Worthing, may be regarded as a misfortune; to lose both looks like carelessness. –The Importance of Being Earnest, Oscar Wilde The pun in this passage relies on which two definitions of the word lose?

“to waste”
“to be defeated in a contest or game”
“to misplace”
“to suffer the death of someone dear”
“to fail to maintain control”