For someone (agent umi-) to add something (theme i-) to something else (loc ref -an), to make a pair.
pana''op
Ita''opmu han kalga' hinan kalgam ta odnam.
Add my cargo to your cargo to make a pair so that you can hold it (all).
For people, things (actor muɴ- & theme) to join together as a pair in a close union, as for a man and woman to join in marriage, two similar chickens to be sold or sacrificed, two logs to be carried.
Nunta''op din inodna' an āyiw hi immayanmih inalāhan.
The (pieces of) wood I held when we went to the forest joined together as a pair.
For someone (actor; s actor maN-) to group two people or things (theme -on) into pairs, as to take two wives, sell two chickens, carry two logs.
pana''op; mana''op
tum'op; to'pon; mana''op; ten'op; man'op; mat'op
Ten'op'u din duwa an kalga an impī'ug'u.
The two (pieces of) cargo that I carried, I took as a pair.
-um-: tum'op; -on: to'pon; maN-: man'op; -iɴ-: ten'op; ma-: mat'op