smaller is nitxiapi

nitxiapi = smaller (adjective) (some things Google found for "nitxiapi": an unique term; did not match any documents; somewhat similar Battle of Xiapi was fought in China in the winter of 198 towards the end of the Han Dynasty)

Word derivation for "smaller" :
Basque = txikiago, Finnish = pienempi
Miresua = nitxiapi

For good measure, I decided, to post smaller too. Small is nitxi. The comparative adjective suffix in Miresua is -api.

Alice got uncomfortably large in the White Rabbit's house: "If I eat one of these cakes," she thought, "it's sure to make SOME change in my size; and as it can't possibly make me larger, it must make me smaller, I suppose."