What does the prefix "aff" mean? [closed]

What does the prefix "aff" mean in the following words:

affine, affirmative, affirm, affable, affection, affluent.

Do they have some meaning in common?

Solution 1:

The common prefix is ad- like in "affirmative.":

• (Modern French affirmer) "affirm, confirm; strengthen, consolidate," from Latin affirmare "to make steady, strengthen," figuratively "confirm, corroborate," from ad-"to" (see ad-) + firmare "strengthen, make firm," from firmus "strong" (see firm (adj.)) . Spelling refashioned 16c. in French and English on Latin model.

Ad-

• word-forming element expressing direction toward or in addition to, from Latin ad "to, toward" in space or time; "with regard to, in relation to," as a prefix, sometimes merely emphatic.

Etymonline