Someone or something as fire, termites, etc., (mang-) wears down/out something (-en, i-).
rúnot
bulók
Ronoten nyo abaw asokar a ginātang ko.
Don't wear down the (block of) sugar I bought.
Ironot mwabaw sabon do laylay mo.
Don't wear down the soap on your clothes.
Ronoten no apoy abab.
The fire wears down the dead tree trunk.
Something (machi-) wears down/out at the same time as something else.
must be reduplicated
Machironronotayaw ahad kwaya kayo do bārotaya.
My fence wears down at the same time as the (barbed) wire.