(of a disease or physical condition) continuing for a long time

incessant, never-ending

going a long way down from the top

extending very far, usually down

firmly attached or fastened; always the same

permanent, steady

regular, usual; having a habit mentioned

usual, established

for a very long time

ancient, old

not able to move or be moved; not moving

motionless, fixed

that cannot be moved; not able, refusing to be affected or changed

fixed, stubborn

(of habits, tendencies etc) deeply fixed; going deep

deep-rooted

decided and fixed; (of opinions, habits etc) fixed and not to be changed; unmoving; a group of games (in tennis etc); a group of similar things; the position (of the body, clothes etc)

decided

not in the form of a liquid or gas; without holes or spaces; of strong material or construction; able to support weight etc

hard, dimensional

usual, established

usual, established

not showing pity or sympathy

firm