grow* heavy;
(о частях тела, голове тж.) begin* to feet heavy;
(о глазах) become* heavy with sleep
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)