What is the root word of "mengerti"?
"mengerti" is formed by prefix "meng-" + root word "erti", which is a non-standard form of "arti".
WHY DO YOU NOT UNDARSTAND MEH!? >:V
YOU'RE JUST SO CONFUSING!
Can this also be mengertimu?
Yes, it can but is not standard. We can see "mengertimu" in some poems.