pro

forward; before; in favor of

Spelled pro · pro 'forward, before, on behalf of'

Latin pro points forward: propel drives forward, protrude thrusts forward, and procrastinate pushes a task toward tomorrow.

Words built from it

proclivity — A natural tendency toward a behavior.
pro- (forward) + clivus (slope), through Latin proclivis (sloping forward) and proclivitas (inclination)
profligate — Recklessly wasteful or immoral.
pro- (forward, down) + fligere (strike), through Latin profligatus (struck down, ruined)
propel — Push or drive forward.
pro- (forward) + pellere (drive), through Latin propellere
protrude — Stick out beyond a surface.
pro- (forward) + trudere (thrust), through Latin protrudere
procrastinate — Keep putting off something that needs doing.
pro- (forward) + crastinus (belonging to tomorrow), through Latin procrastinare
prolong — Make something last longer.
pro- (forward) + longus (long), through Late Latin prolongare
proponent — Someone who supports an idea or proposal.
pro- (forward) + ponere (put), through Latin proponere (put forward) and its participle proponent-
provide — Supply something needed.
pro- (before, ahead) + videre (see), through Latin providere (foresee, prepare)

probity — From Latin probitas, meaning uprightness, based on probus, meaning good or honest. Its pro is not this prefix.