For someone or something (actor muɴ- & theme) to sink in a liquid, as of dirt which gradually settles, a stone which quickly sinks.
lumnong
Nalaka nan batun munlonong hinan danum ti madamot.
A stone easily sinks in water because it is heavy.
-um-: lumnong
For someone (agent) to submerge someone, something (theme ipa-, pa-on) in a liquid (loc ref), as rattan to allow it to soak and soften.
malnong; ipalnong; palnongon
ipa-: ipalnong; pa-on: palnongon