Retrospective
In Latin the word that means 'looking back on past events' is 'retrōspectus'. In English, this is 'retrospect'.
recollect
re-think flash back alternative past memory
It means "looking back". In retrospect, it is clear that we should not have purchased that property.
"Recent" could be the word you are looking for.
The word you're looking for is - coughed
The word you're looking for is... plucked.
backed.
No, it is not a preposition. The word look is a noun, or a verb.
The word you're looking for is "blew."
Reminiscing.
Wide is not a verb, so it does not have a past tense. Widened may be what you are looking for, as it is the past tense of the verb widen.