Old joke: Three bachelors were kidding their married friend.
. . ."You've been married five years now, George," said one, "and still no childeren? Is your wife" (and here he tried a very bad pun) "unbearable?"
. . .Or," interjected another, "perhaps she's inconceivable?"
. . ."Maybe she's, uh, impregnable," joked the third.
. . .George shook his head sadly. "No, boys, you're all wrong. She's insurmountable and inscrutable."

A thorough logophile would have more puns here. Let us look at some words that would fit punningly, and look at their true meanings.

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George shook his head sadly. "The woman never even stops talking. She's simply not mutable."

A pun, because in fact mutable is not a form of to mute, make silent.
mutable – prone to change; inconstant; also, capable of change or of being changed
[The antonym, immutable, is more frequently used.]

Jack and Emily were the monikers most frequently given to boys and girls in England and Wales last year. Jack has been tops for a decade, and favourite boys’ names only shuffle their order over time. But Emily has been No 1 for just two years, and girls’ names tend to be more mutable, changing with fashion.
– The Times, Jan. 5, 2005

I dare say this is an abortive thread!

George added, "She doesn't like bedabbling." George is punning on these two words:

bedabble - (trans. v, from 'dabble') to dabble upon; to sprinkle or wet
beddable - (informal, from 'bed') sexually attractive or available

His face was round, white, pockmarked and bedabbled with sweat like a Cheshire cheese. - Susanna Clarke, Jonathan Strange & Mr. Norrell: A Novel

I stared upon his blood-bedabbled breast
And sang my malediction with the rest.
- William Butler Yeats, A Woman Young and Old


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He still runs away from danger when he can, still seduces, or is seduced by, every beddable woman, still lies, flatters, and cajoles without scruple.
- Anthony Lejeune, book review in National Review, July 10, 1995

Adrienne Shelley, star of Sudden Manhattan, says: "I got a call in my car on my way to an audition from my agent. He said, 'The important thing is that they think you are beddable.'" - Nigel Reynolds, Hollywood femmes fret about 40, London Daily Telegraph, May 18, 2002