ISEE/SSAT Vocabulary BuilderWord partsNumber partsoct
Number partLatin
oct
eight
Greek oktō and Latin octo mean eight: an octopus has eight feet, an octagon eight angles, and an octet eight performers.
Words built from it
- octopus — a sea creature with eight arms
oct (eight) + pus (foot) - octagon — a shape with eight sides
oct (eight) + gon (angle) - octagonal — having eight sides
oct (eight) + gon (angle) + -al - octet — a group of eight, especially musicians
oct (eight) + -et (small group) - octave — a span of eight musical notes
oct (eight) + -ave (ordinal ending) - octogenarian — a person in their eighties
oct (eight) + gen (tens) + -arian (person of an age)
Looks like it, but is not
- nocturnal — from Latin nox/noct- 'night' — the 'oct' here is part of 'noct', unrelated to octo 'eight'
Drill this word part in the app
More number parts
- hex, sext — six
- nona — nine
- pent, quin — five
- quad, tetra — four
- tri, ter — three