Adpositions are Na'vi words (frequently prepositions) that can precede a noun or suffix one to modify it like an adjective. They cannot be used independently of nouns, which is why they occupy the final category of the 'affixes' section. Some adpositions cause lenition, which will be marked with +​.

Prefix	Meaning
äo	Under, below
eo	Before, in front of
fa	With, by means of
fpi+	For the sake of
ftu	From (direction)
hu	With
ìlä+	By, via, following
ka	Across
kip	Among
mì+	In, on
mungwrr	Except
na	Like, as
ne	To, towards
ta	From
teri	About, regarding
vay	Up to
fkip	Up among
io	Over, above
kxamlä	Through (the middle of)
lok	Close to
maw	After (time)
mìkam	Between
nemfa	Into, inside
pxaw	Around
pxel	Like, as
sìn	On, onto
takip	From among
uo	Behind
luke	Without
tafkip	From up among
ro+	At
sre+	Before
wä+	Against
pxisre+	Right before
pximaw	Right after
rofa	Beside, alongside
few	Across
lisre+	By, before, up to (but not after)
kam	Ago
kay	From now
nuä+	​Beyond
sko+	Something as, in the role of something else
talun	Because of
ftumfa	Out of, from inside
yoa	In exchange for
krrka	During
ftuopa	From behind
raw	Down to