Today's Latin word is VIDEO (video, videre, vidi, visus), which means "I see" in Latin - but of course we use the word "video" as a noun in English, too!
There is an enormous number of Latin words with the root vid- or vis- (you can remember that form of the stem by thinking of the English word "vision"). One of the most interesting is the word invidia, meaning "envy" (the English word itself is derived from Latin invidia). For the Romans, envy was related to the idea of the "evil eye." Invidia meant looking at someone with resentment, begrudging that person else the good things that they have.
Here are some examples of today's word in Latin sayings and proverbs; for more information, see the page at the Scala Sapientiae, which contains notes on some of the proverbs cited below, as well as additional proverbs:
Esto quod esse videris.
Cui des videto.
Dis aliter visum.
Quod vis videri, esto.
Unus vir non omnia videt.
Ite et videte.
Non semper ea sunt quae videntur.
Vide et crede.
Veni, vidi, vici.
Quis est vir qui vivat et non videat mortem?
Mens videt, mens audit.
Esse quam videri.
Video alta sequorque.
Oculus videns alia, seipsum non videt.
Plus vident oculi quam oculus.
Omnia videt oculus domini.
Magis vident oculi quam oculus.
Si stas, vide ne cadas.
Qualis vis videri, talis esto.
Quales sumus, tales esse videamur.