refractory
Meaning
stubbornly resistant to authority or control
(of a substance or material) resistant to heat or other forms of treatment; difficult to fuse, reduce, or work
(of a disease or condition) not responding to treatment
Structure
Usage
the refractory child refused to follow any of the teacher's instructions.
firebricks are made from refractory materials that can withstand extremely high temperatures.
the patient's refractory hypertension did not improve with the standard medications.
Etymology
The word 'refractory' originates from the Latin verb refringere, meaning 'to break back' or 'to break open', itself composed of re- ('back') and frangere ('to break'). This literal sense of breaking back evolved metaphorically to describe something that 'breaks back' against force or control, hence 'stubborn' or 'resistant'. In scientific contexts, beginning in the early 17th century, it was applied to materials that resist breaking down under high heat or chemical processes. Thus, the core logic of the word connects the ancient concept of breaking or bending back to modern abstract meanings of resistance and obstinacy.
Analysis
re- (Latin prefix, meaning 'back' or 'again'), fract (from Latin fractus, past participle of frangere meaning 'to break'), -ory (Latin adjectival suffix, meaning 'pertaining to' or 'characterized by').