[1] The word 'enneagram' combines the numeral prefix ennea- with the Greek suffix -gram.

The gram suffix derives from γραμμῆ (grammē) meaning a line.

Two forms of regular enneagram exist: There is also a star figure, {9/3} or 3{3}, made from the regular enneagon points but connected as a compound of three equilateral triangles.

[3][4] (If the triangles are alternately interlaced, this results in a Brunnian link.)

[5] The nine-pointed star or enneagram can also symbolize the nine gifts or fruits of the Holy Spirit.