tweak
verb (used with object)
to pinch and pull with a jerk and twist.
had been tweaking
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past perfect progressiveof tweak.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
APOBEC3 can edit the genomes of many viruses, including SARS-CoV-2, and the sheer number of edits indicated that this human protein had been tweaking the monkeypox virus for a long time.
From Scientific American ● Jul. 20, 2022
Liman had been tweaking and tinkering, trying to capture the essence of war, going at it so heavily he was still editing less than a month before the film’s release in theaters by Roadside Attractions.
From Los Angeles Times ● May 13, 2017
One possible question was Cram's occasionally tender left calf, which had been tweaking him after the Nice race.
From Time Magazine Archive
