lif

The root life is about as native and as fundamental as English gets. It comes from Old English līf, a Germanic word that meant exactly what it means today: the state of being alive, and the span of time you are alive for. It is a cousin of the verb 'to live' and of German Leib (which drifted to mean 'body'), all going back to a Proto-Germanic root tied to the idea of remaining, persisting, going on.

Because life is a plain Germanic noun, it does not build a Latin-style family of prefixed verbs. Instead it builds compounds the simple Germanic way — by sticking another everyday word onto it:

- life + style -> lifestyle: the style or pattern in which you live
- life + time -> lifetime: the whole time your life lasts
- life + saver -> lifesaver: a person or thing that saves a life
- wild + life -> wildlife: living things (animals, plants) in the wild

Notice how transparent every one of these is. You never have to 'decode' a life- compound the way you decode a Latin word like 'conjecture'; the meaning is right there on the surface. That transparency is exactly what makes life such a productive word: speakers can invent new compounds on the spot (life coach, life hack, life support) and everyone instantly understands them.

A word of caution about look-alikes. The words proliferate, proliferation, and proliferative LOOK as if they contain 'life' — and the connection sounds tempting, since proliferation is about things multiplying and spreading like living organisms. But the resemblance is an accident of spelling. Those words come from Latin proles (offspring) + ferre (to bear / carry), literally 'bearing offspring.' The '-lifer-' you see is proli- + -fer-, not the English word 'life.' They belong to the fer ('carry') family, not to this root, and are flagged for removal from this group.