To Distinguish, To Tell Apart, To Recognize
transitive verb, ichidan verb
You see something, then you "separate" (分ける) it. This is the same thing as to distinguish, to tell apart, or to recognize. This verb is transitive, so you're doing the action to something. You're distinguishing between things or people.
みわける
You should know the reading of 見 already. The second part, 分ける is a word you should have learned in the previous level. Combine that knowledge together and you get the reading for this word.
兄弟を目の色で見分ける。
I tell the brothers apart by their eye colors.
あの男が言ったことが本当かどうか見分けるなんてムリだよ。
It's impossible to tell whether what the man said is true.
ダイヤモンドと石ころを見分けることは出来ますか？
Are you able to distinguish between diamonds and stones?