deeply

adverb

1. at or to a considerable extent downward; well within or beneath a surface.
2. to a thorough extent or profound degree: deeply pained; deeply committed.
3. with depth of color, tone, sound, etc.
4. with great cunning, skill, and subtlety.

adv.

Old English deoplice (see deep (adj.)), used in both literal and figurative senses.