Quadrilateral Quadrangle
quadranglequadruple
Words that begin with the prefix "ie" include "ielectric," "iefficient," and "iempower."
Tetra- as in tetrapod and tetrahedron. Quad- as in quadrillion and quadrilateral
quadrant, quadrangle, quadruple, quadruplet, quadrophonic
Quadrant and quadruped are words that begin with quad. Triad, trial, triangle, tribe, tribunal and trick are words that begin with tri. Bias, bib, bible, bicycle, bid and bird are words that begin with bi.
These are two medical terms that has prefix QUAD. quadriplegia & quadruplet
Some words that begin with the prefix "ambu" include ambulance, ambulatory, and ambulate.
incredible
insert
outside
Some words that begin with the prefix "aug" include: augment, august, augur, and augury.
Words that begin with the prefix "ir" and mean "not" include irregular, irresponsible, irrelevant, and irrational.