Second-person singular simple present form of calm(verb)
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Use "calmest" in a sentence
"There is always, even in calmest seas, a slight surf on the shore, and there is no time to lose if you will catch a boat when it comes in on a wave before it recedes again."
"If we then assume that nearly all of any urban effect will be concentrated in the calm nights, which were defined as the calmest third of nights, then overall urbanisation trends of about 0.03 deg C per decade a bit more than a third of 0.078 deg C per decade in minimum temperature should be readily detectable."
"Warsaw - A holiday weekend claimed 33 dead and 374 injured on Polish roads with 1,217 drivers pulled over for drunk driving - in what police called the calmest All Saints 'Day in about a decade, local media reported."