-ng-

• -g- – for compounds with preceding stem ending with letter (n).
• -m- – for compounds with preceding stem ending in a vowel, but next stem starts with the letter (b) or (p).
• -n- – for compounds with preceding stem ending in a vowel, but next stem starts with the letter (d), (s), or (t).

From -ng (“enclitic suffix”).

…ng… or …ng-…

1. Compound interfix, connecting the adjective stem to the noun stem, after the preceding stem ends in a vowel.

   Synonyms: -g-, -m-, -n-, na, -ng, -g

   ‎haba + ‎-ng- + ‎buhay → ‎habang-buhay

   ‎bunga + ‎-ng- + ‎kahoy → ‎bungangkahoy

• Tagalog words interfixed with -ng-