Here are some examples:
* Activate: to make active
* Educate: to make educated
* Irritate: to cause irritation
* Animate: to give life to
* Liquidate: to turn into liquid
* Fortunate: to make fortunate
It's important to note that "-tate" isn't always the only suffix in a word. It can be combined with other suffixes, like "-ion" (as in "activation") or "-ive" (as in "irritative").