The Prefix ad-

Word Bank

adopt
adhere
assortment
accomplish
aggravate

affixed
approximate
annotated
appraise
allocated

Key Concepts

1. The prefix ad- means "to" or "toward."

   ad + join = adjoin

2. The spelling of this prefix changes to make words easier to pronounce. Ad may become ac, af, ag, al, an, ap, as, or at.

3. Changes in ad- may create words with double consonants.

   acclaim

   affront

   allure

   associate

   attend