them into verbs, _sato_, _satoai_. When this syllable _ai_ is
suffixed to verbs the genitive _ni_ may be added, and to the form
_aini_ the consonants f, m, ng, t, are prefixed: _oli_ to return,
_olifaini_ to carry back, _ala_ to answer, _alamaini_ to consent,
_sau_ to become, _saungaini_ to make, _tagala_ lost, _tagalangaini_
to drive out, _foaa_ to pray, _foaataini_ to pray for. The forms in
_ai_ are also used intransitively: _tege_ to fall, _tegelai_ lost,
_oli_ to turn, _olitai_ converted.

The genitive _ni_ (cf. M. L., p. 532) is often omitted and is not
invariably used as it is in Sa'a, since the form _ai_ without the
addition of _ni_ is transitive: _gonitai_ to receive, _gwoutai_ or
_gwoutaini_ to be left alone, _oalangai_ to apportion, _fatolamai_
to command.

_Ani_ appears to be used by itself as a transitive suffix: _ui_ to
throw, _uiani_ to throw away, _laga_ to drive, _lagaani_ to drive
away, _taba_ to strike, _tabaani_ to destroy; _ani_ is used also
with _too_ to hit, _tooani_ to understand.

With either class of suffixes there is no difference in meaning
between one suffix and another.

5. Prefixes to verbs: These are causative and reciprocal.

The causative is _fa_: it may be prefixed to almost any word, and it
may be used with words which have a transitive suffix. The use of
_fa_ frequently obviates the use of a transitive suffix and of
itself makes verbs transitive.