as in to add
to join (something) to a mass, quantity, or number so as to bring about an overall increase
the ticket agency tacked on a hefty surcharge to what was already a hefty price for the theater tickets
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Recent Examples of Synonyms for tack (on)
add
Verb
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Xavier Edwards, Liam Hicks and Brian Navarreto added two hits apiece for the Marlins.
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Meanwhile, oil supply is also expected to increase after oil cartel OPEC+ agreed to add 188,000 barrels a day to their output target for August.
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“Tack (on).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tack%20%28on%29. Accessed 6 Jul. 2026.
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