Suffixes -ig-, -igx-.
"-ig-" means "to make" or "cause" someone or something to be or to do
that which the word denotes, while "-igx-" means "to become" so or such
oneself. Thus from "rugxa", red, we get "rugxigi", to make (something
or someone) red, "rugxigxi", to become red oneself, to blush; "klara",
clear, "klarigi", to make clear, to explain, "klarigxi", to become
clear; "sidi", to sit, to be sitting, "sidigi", to cause someone to sit,
"sidigxi", to become seated, to sit down; "kun", with, "kunigi", to
connect, "kunigxi", to become connected with; "devi", to have to (must),
"devigi", to compel; "fari", to do or make, "farigxi", to become; "for",
away, "forigi", make (go) away.