prefix

Universal Words noun, verb noun 1 (grammar) a letter or group of letters added to the beginning of a word to change its meaning, such as un- in unhappy and pre- in preheat compareAFFIX, SUFFIX 2 a word, letter or number that is put before another: Car insurance policies have the prefix MC (for motor car). 3 (old-fashioned) a title such as Dr or Mrs used before a person's name verb [VN] ~ A to B