Oct is the prefix for eight. Bi is the prefix for two.
0 1 2 3 4 5 6 7 8 9nil un bi tri quad pent hex sept oct enn
Hex- means six and oct= means eight.
Di-, Bi-
bi-sect
a-, anti-, ad-, al-, bi-
Kilo and Mega. Also Unio and bi and motor.
Prefixes meaning 4 are quad (Latin) and tetra (Greek).
These prefixes are:meth, eth, prop, but, pent, hex, hept, oct, non, dec.
of suffix
Some examples of prefixes are: un-, re-, pre-, dis-, mis-, non-, in-, and anti-.
Prefixes occur as the first part of a word, such as the prefix "bi" meaning two as in bicycle and bicarbonate or the prefix "sub" meaning under as in submarine or submit.
tri qua pen hex hep sep oct non dec hen dod