All ductile antonyms
duc·tile
D d adj ductile
- intractable — not easily controlled or directed; not docile or manageable; stubborn; obstinate: an intractable disposition.
- unyielding — unable to bend or be penetrated under pressure; hard: trees so unyielding that they broke in the harsh north winds.
- hard — not soft; solid and firm to the touch; unyielding to pressure and impenetrable or almost impenetrable.
- inflexible — not flexible; incapable of or resistant to being bent; rigid: an inflexible steel rod.
- stiff — rigid or firm; difficult or impossible to bend or flex: a stiff collar.