BIPED

A creature with two feet

CENTIPEDE

A creature with 100 feet

IMPEDIMENT

MILLIPEDE

Something that stands in one's way; an obstacle

A creature with 1000 feet

PEDAL

a lever that is moved with one's foot

a person who goes from PEDDLER

door to door on foot trying to sell a product

PEDESTRIAN

a person who walks across the street on foot

a foot treatment that PEDICURE

could include soaking the feet and polishing the toenails

QUADRUPED

TRIPOD

PREAPPROVE

PRECAUTION

a four-footed creature

a three-footed stand often used to balance a camera

to authorize or give permission in advance

a measure taken in advance to prevent harm

PRECEDE

PREDICT

to come before something in time, order, or rank

to say what will happen before it happens

a syllable or word that PREFIX

comes before a root word to change its meaning

PREJUDGE

to make a decision before you have all the facts

to pay for something PREPAY

before it needs to be paid in full

a test before the real test; PRETEST

usually given to see what is already known

PREVENT

PREVIEW

to stop something from happening before it occurs

to look at something before something or someone else