hex-

from The Century Dictionary.

• noun In chem., in compound words, signifying the presence of six atoms of an element or six molecules of a compound.

from the GNU version of the Collaborative International Dictionary of English.

• A prefix or combining form, used to denote six, sixth, etc..

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• prefix Form of hexa- used before a vowel.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an evil spell
• verb cast a spell over someone or something; put a hex on someone or something
• adjective of or pertaining to a number system having 16 as its base