The Austronesian Comparative Dictionary

*saŋsáŋ to confront one another, as in a dispute

PPh saŋsáŋ to confront one another, as in a dispute

WMP
Ibaloy man-saŋsaŋ to face one another (implies opposition, hostility, as in disputes, court cases, opposing politicians)
Pangasinan man-saŋsáŋ to discuss something, debate, argue
Aklanon sáŋsaŋ be harsh on, be stern with
Maranao sansaŋ to oppose, go against; hit, as swords in fencing
Tausug s<um>aŋsaŋ to go against (a current of water or wind)
Bikol mag-saŋsáŋ-an to criticize someone in print, on the radio, etc.