physically painful; to ache; to feel a sore or sharp pain

(bound form) deeply; thoroughly; immersed in something

bone marrow; the soft tissue inside bones that produces blood cells

(adverb) thoroughly; deeply; to one's heart's content, often describing an action done with great intensity or vigor

penetrate deep into the bone; describes a feeling or state that has reached an extreme or intense level, such as deep hatred or love

(bound form) the essence or innermost part of something