This is all I have in my notes about {‘an}:
‘an waste (v) (qep'a' 2018)
"as someone sacrifices forces for a certain goal or just wastes one’s resources" (qep'a' 2018)
‘anmoH sacrifice (v) (qep'a' 2018)
Does anyone have anything else, for example being used in a sentence by Okrand from the qep’a’?
-- Voragh
On Facebook, Lieven posted a video where he was talking about some of the new words with Okrand. Okrand glossed {'an} as "be a waste", as a stative verb instead of a transitive one.
As for the original question, using {-meH} with {-pu'} or {-ta'} seems like it would mean something like "in order to complete doing something".
{paq vIlaDta'meH juHwIjDaq jIratlh.} "I stayed home to complete/finish reading the book." I wanted to make "reading the book" a completed action, so I stayed home. Something like that. It might not translate easily into English but the usage makes sense.