hypo/hyp:

as a prefix can mean variously "under," "beneath," "down," or "below normal."

1. hypocrisy:

   pretending to be what one is not or to feel what one does not really feel.

2. hypothetical:

   Involving an assumption made for the sake of argument or for further study or investigation.

3. hypothesis:

   put under consideration.

Cornog, M. (1994). Merriam-Webster's vocabulary builder. Springfield, Mass: Merrian-Webster.