refractory
adjective
- 1
stubbornly resistant to authority or control
a fractious animal that would not submit to the harness
a refractory child
- 2
temporarily unresponsive or not fully responsive to nervous or sexual stimuli
the refractory period of a muscle fiber
- 3
not responding to treatment
a stubborn infection
a refractory case of acne
noun
- 1
lining consisting of material with a high melting point; used to line the inside walls of a furnace
Also useful for “refractory”:Crossword— A long fill for tough grids