Something sharp (-om-, machi-) pierces, punctures the surface of something superficially.
past komnochim
Binagkong daw yaken, ki tod a komnochim.
They stabbed me, but it just pierced (my skin) superficially.
Tod a nachikochim pinatarok mwaw a parey mo.
(You) just punctured (the soil) superficially (when) you erected your post (driving in the pointed end).
Someone puts or plants something into the soil (pa--en) superficially.
Tomnobo abaw inmoha mwaw, ata tod mo a pinakochim.
What you planted did not grow, because you just (planted it) superficially (in the soil).