https://youtu.be/G5cnUj60g3A

Prefix " no".
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"Поесть - is perfect. It means finished action.
2. The prefix "по-" does not mean only "a little".
It means - limitation in time (поговорить, поспать); used with the suffix "-ива/ыва" - intermittent action (постукивать, поглядывать, покашливать); beginning of action (побежать, пойти); finished action (поел, побил).
There are dual meanings: so, "полить" means both finished action "to have watered (a plant)" and beginning of action "полил дождь (it started to rain)". "

https://forum.wordreference.com/thre...D1%8C.2314039/