Is “Prefix” a Scrabble word?
Yes
PREFIX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Prefix
noun
1.Something placed before another
Synonyms: forefix
verb
1.To determine beforehand; to set in advance.
2.To put or fix before, or at the beginning of something; to place at the start.