To reaffirm is to make a renewed commitment to something, usually verbally.

If you affirm something, you are saying "I believe in this!" So reaffirming repeats your belief, making it clear that you still feel that way. Politicians reaffirm their beliefs when they repeat a promise people may have forgotten or had cause to doubt. When a married couple renews their vows, they're reaffirming their love for each other.

Definitions of reaffirm
  1. verb
    affirm once again
    “He reaffirmed his faith in the church”
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    type of:
    say yes to
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