chromatophore, a pigment-bearing cell.

(idiomatic) to remove obstacles in the way of one's objective

assistant / sub- / deputy / vice-

on the verge of / on the brink of

seesaw; teeter-totter

sausage

organization (a group of people with a purpose) / system (a group of people) / (biology) tissue (a group of similar cells that function together to do a specific job)

an ape, (in particular) a gibbon / aiming at / aiming for; in pursuit of something / waiting for an opening; awaiting one's chance

a manor, a villa / a village, a hamlet / number of mahjongg games (counter)

accuse, appeal, complain, sue