carry John and Bill move three-three suitcases means they moved three each. Without reduplication it was three total.
In verbs, this may indicate:
Intensification of action:
honer - to break apart; to smash
honerhoner - to smash to bits; to pulverize
joak - to be small
joakjoak - to be tiny; to be miniscule
Prolonged or exhaustive action:
toy - to face; to look at
toytoy - to survey; to inspect; to peruse
skaom - to wash; to clean (dynamic)
skaomskaom - to wash up; to clean up (perfect)
