I . a.
1.
Down-reaching, reaching far down, of great depth.
2.
Mysterious, intricate, knotty, difficult, hard ( to comprehend ), unfathomable, profound.
3.
Sagacious, penetrating, intelligent, discerning, shrewd, astute.
4.
Absorbed, engrossed, rapt up.
5.
Grave, low, not high, not sharp.
6.
Dark, intense.
7.
Great, thorough, entire, heartfelt.
II . n.
1.
Sea, ocean, main, abyss of waters.
2.
Depth, profound, abyss, ~est part or place, recess, bottom.
3.
Mystery, enigma, profound riddle.
4.
Stillness, silence, stillest part, inmost part, midst.
III . ad.
See ~ly .