Полный русско-английский словарь
Несовер.; без доп. 1) grow heavy; become heavier, increase in weight (прибавлять в весе); put on weight, gain weight, grow stout (толстеть) 2) become heavy with sleep (о глазах, веках) несов. grow* heavy; (о частях тела, голове тж.) begin* to feet heavy; (о глазах) become* heavy with sleep.