凝

muscle stiffness (esp. in shoulders); lump (in tissue, esp. breast); swelling; hardening; lesion; lingering discomfort; uneasiness; bad aftertaste; unpleasant feeling

to grow stiff; to be absorbed in; to be devoted to; to be a fanatic; to elaborate

coagulation; freezing; solidification

to concentrate; to devote; to apply; to strain; to rack

agglomeration; clumping together; cohesion (of ions, etc.); flocculation (of colloidal particles); agglutination

to stiffen; to harden

to congeal; to freeze

condensation; to condense (steam, ideas, emotions, etc.)

to freeze; to congeal; to concentrate one's attention on; to devote oneself to something; to ponder; to meditate

tuff