pa- -in

Tagalog

Circumfix

pa- -in

1. (causative) Object trigger - Circumfix to form the causative verb form of the adjectives

   pa- -in + ganda (“beauty”) → pagandahin (“to make something beautiful”)

   pa- -in + laki (“size”) → palakihin (“to make something bigger”)

   Palakihin mo 'yang sulat mo.

   Write bigger.

2. (causative) Object trigger - Indicates performance of the action of the verb

   pa- -in + upo (“sitting”) → paupuin (“make someone sit down”)

   Paupuin mo 'ang mga bisita.

   Ask the visitors to sit down.

Further reading

1. https://learningtagalog.com/grammar/verbs/verb_affixes/pain.html