taciturn; uncommunicative; silent

heavy; hard; serious; critical

to be fast asleep; (fig.) to lie dormant; to lie undiscovered

to soak; to permeate; to immerse

to sink

to sink down

to sink into despondency; (of morale, willpower etc) to diminish; to plummet

to attack and sink (a ship)

deep; profound; (of a person) reserved; undemonstrative; (of a voice, sound etc) deep; low-pitched

(of weather) overcast; gloomy; (of a voice) low and deep; low-spirited; downcast