Learn Hardcore Filipino: Timbangin mo iyan.

In timbangin, the verb has been formed from that root using an affix pattern that makes it mean something like weigh it / weigh that in this sentence.

So:

timbang = weight, weighing
timbangin = to weigh something, or in command form, weigh it/that

Why does the verb end in -in?

The -in is a very common Filipino verb ending. In sentences like this, it often marks a verb that focuses on the thing being acted on.

Here, the thing being acted on is iyan (that), so timbangin is the natural form for weigh that.

A learner-friendly way to think about it is:

timbangin mo iyan = weigh that
the action is directed toward that thing

This is one reason Filipino verbs often look very different from their root words.

Why is mo used here?