riai
Bingham
riái
a. becoming, fit, proper, suitable.
Sabatier
riai
n. justness, goodness, fitness, propriety, obligation, necessity.
a. good, just, expedient, fit, obligatory, necessary.
v. e riai: must, it is right, necessary.
ex. I riai: I must, I should, I ought, it is right that I...
vt. ka-riaia: to consent, to comply, to approve, to admit, to permit, to authorize (lit. find good, just, proper).
n. approbation, permission, etc.
vc. kariaiaki: idem.
ex. e kariaiaki: approved, permitted.