duet
See the related link for a list with OVER 1,500 words starting with the prefix IN.
Yes, spec is a prefix. See the related question for a list of words beginning with this prefix.
Bio- means life......and some words areBiologyBiographyBio hazard
periphery periscope perimeter
complete,complain,computer,
Some examples of words with the prefix "sys" include: system, systematic, synergy, and symbiosis.
Mircro is the prefix for small. Some words are microscope, microfilm, microvolt, mircrometer, microcard, etc.
bibliography, bibliophile, bibliopole. YAY!!
as a prefix, it means "around." For instance, "circumnavigate the world" means to navigate around the world.
tripodtricycletrialtripletriathlontriangletriptricktricycle, triceratops, triathalon, tripod.
equilateral, equilibrium, equinox, equivalence