The Austronesian Comparative Dictionary

*paRi- prefix of reciprocal or collective action

PEMP paRi- prefix of reciprocal or collective action

SHWNG
Buli fa- prefix which indicates that the action concerns a plural subject; with nouns it also forms collectives (e.g. 'sister', 'sisters')
fa- prefix used for the reciprocal form of a verb
fai- prefix which indicates that the action concerns a plural subject; with nouns it also forms collectives (e.g. 'sister', 'sisters')
OC
Woleaian fe- reciprocal prefix, attached to 'to' and 'away from'
Gilbertese ai- prefix to some words having the meaning of reciprocity; ex., hit one another, look at each other, follow one another, etc.
Mussau ai- reciprocal or collective action (possibly fossilized in 'fight', 'copulate')
Label war- reciprocal prefix
Cheke Holo fari- reciprocal prefix; simultaneously, mutually (e.g. 'eat together')
Bugotu vari- prefix denoting reciprocity
Arosi hari- reciprocal prefix generally having the force of united action, rather than mutual action
Rennellese he-...ʔaki common affix indicating reciprocal or plural action
Rotuman hai- prefix forming reciprocal verbs
Mota var- prefix, 1. of reciprocity, 2. of plurality (e.g. children crying all together)
Samoan fe- prefix to word-bases, used either alone or in combination with a suffix...(a) when is used without a suffix it may denote the plural...(b) when used in combination with a suffix... may denote (i) the plural, (ii) a reciprocal process, (iii) an action or process carried out here and there, up and down, hither and thither, all around, quickly, etc.
Fijian vei- a prefix. Added to nouns it forms a collective plural ( 'house', 'a group of houses'). Added to verbs it makes reciprocals. It may also be added to names of relationships to produce a reciprocal sense: 'brother and sister', the relationship
Tongan fe- the so-called reciprocal prefix... It may be: (a) actional, (b) habituative, (c) invigorative, (d) accelerative, (e) communal, indicating united or simultaneous action, (f) collaborative, (g) reciprocal, (h) competitive, (i) reciprocative, meaning hither and thither, or in (or to or from) various directions