The Austronesian Comparative Dictionary

*humbak wave, billow, swell at sea

PWMP humbak wave, billow, swell at sea

WMP
Tagalog humbák hollow, concave (of cheeks, stomach or the like)
Hanunóo humbák wave(s) at sea, ocean waves
Aklanon húmbak wave, crest
Maranao ombak artesian well; water pump
Toba Batak umbak wave
Iban umbak wave
Malay ombak wave; billow; (in art) wavy pattern. Esp. of broken or foaming waves, in contrast to rollers or ground-swell
Rejang umboʔ wave
Wolio umba swell (of sea)
Sundanese ombak wave, swell (of sea)
Old Javanese umbak wave
Madurese ombaʔ wave, swell, billow
Javanese ombak a wave
Balinese umbak wave, surf
Sasak umbak wave, billow

PWMP humbak-humbak rise and fall like the swells at sea

WMP
Maranao ombak-ombak artesian well; water pump
Toba Batak umbah-umbah the piston which is moved up and down in the bamboo tube of a traditional bellows

PWMP ma-humbak full of waves, as a stormy sea

WMP
Aklanon ma-húmbak wavy, stormy, rough (sea)
Old Javanese m-ombak-ombak-an undulating, surging, in waves
m-ombak with waves, undulating, surging