Second-person singular simple present form of come.(verb)
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Use "comest" in a sentence
"He read it and replied to the messenger snake, ‘Thou comest from the Queen of the Serpents whom I am minded to visit for I have an occasion to her.’"
""In whose name comest thou?" repeated the priestly man."
""In whose name comest thou?" demanded the Father Miguel, advancing a space toward the stranger, but not in threatening wise; whereat the aged man stopped in his course and lifted his eyebrows, and regarded the Father a goodly time, but he spake no word."