Prefixes For Numbers

Front 1

Prim/i-

Back 1

First

Front 2

Mon/o-

Back 2

One

Front 3

Uni-

Back 3

One

Front 4

Hemi-

Back 4

Half, one side

Front 5

Semi-

Back 5

Half, partial

Front 6

Bi-

Back 6

Two, twice

Front 7

Dipl/o-

Back 7

Double

Front 8

Tri-

Back 8

Three

Front 9

Quadr/i-

Back 9

Four

Front 10

Tetra-

Back 10

Four

Front 11

Multi-

Back 11

Many

Front 12

Poly-

Back 12

Many, much