figurative. Of thoughts or feelings, the mind or soul, personal relations, etc.: Most inward or intimate; deepest; closest.

Inward, inner, internal; inwardly felt, heartfelt.

Modifying a mass noun. A great amount or quantity of, a lot of. Of an emotion or other internal state: intense, severe, great. Also: experienced…

Deep-rooted in the breast; that comes from or enters into one's inmost nature or feelings; that affects one profoundly.

Conceived in or coming from one's inmost heart; deeply felt, heartfelt; hence, earnest, fervent.

Of a feeling: keen, strongly felt. Now somewhat archaic.

Having an acute effect on the mind or emotions; intensely affecting; deeply distressing.

Eager, impetuous, violent. Of feelings: Keen, ardent. Obsolete.

Of reverence, respect, etc.: sincere; humble.

Of an emotion, belief, etc.: deeply felt or held; heartfelt, acute, intense.

Affecting the viscera or bowels regarded as the seat of emotion; pertaining to, or touching deeply, inward feelings. Obsolete after 17th cent. and…

Felt within; inwardly felt or experienced.

Existing in the heart; belonging to the inner feelings. rare.

Fixed or established in the heart. Obsolete.

Felt intimately or strongly; heartfelt.

Of pain, pleasure, etc.: Intense, acute, keen.

Deeply rooted or implanted; chiefly figurative, of feelings, opinions, prejudices, etc.

Pertaining to the inmost thoughts or feelings; proceeding from, concerning, or affecting one's inmost self; closely personal.

Of feelings, powers, sentiments, states of the mind. Carried to a high degree; intense.

= heartfelt, adj.

colloquial. = pathological, adj. 4.

That is deep enough to reach or expose a bone; (hence figurative, of feelings, attitudes, etc.) profound, deep-rooted.