Find Antonyms

ack Antonyms

Opposite of ack

Pinning down the opposite of ack requires matching its exact sense, so the antonyms and opposite words below are paired with a clear verb definition and ranked by contrast strength.
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• verb (Context 1)

To acknowledge the receipt of a network packet, alert, message, or software patch (especially in computing and engineering contexts).

Usage Example

"The on-call engineer quickly acked the system alert and began investigating the outage."

Strongest
ignore
Strong
reject

Similar words to ack

Words similar to ack shift depending on context. Common synonyms include:

acknowledgment
acknowledge
roger
ugh
confirm
copy
confirmation
argh
See all synonyms of ack

• Nearby Words

acidity
acidly
acidness
ack
acknowledge
acknowledged
acknowledgment

Cite this Entry

Wordmom. (2026). Antonyms for Ack. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/ack
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