τήρει [17 verses](verb 2nd sg pres imperat) "Observe" is tereo, which means "to watch over," "to guard," "to take care of," "to give heed to," "to keep," "to test by observation or trial," and "to observe." Jesus often uses it with the Greek word meaning "care for" to associate the two ideas.   - The word translated as "keep" means "to watch over," "to guard," "to take care of," "to give heed to," "to keep," "to test by observation or trial," and "to observe." Jesus uses this word seventeen times, almost always with the idea of "keeping" in commandments or words. "Keep" works well because it combines the idea of "guarding" and "observing," but "take care of" works even better when this verb is used with related ideas such as "cares for."