unpliable

The very disadvantages,—an unheroic presence, an uninspired countenance, an unmelodious and unpliable voice, the necessity of interposing glasses between his clear blue eyes and his audience, and thus veiling the heavens that lay behind them,—helped him by putting out of mind all thought of meretricious attempts at influence, and compelling recognition of the intellectual and moral force which could so easily dispense with what most orators consider invaluable aids.

There was something fixed in it, and Archie's nebulous easy-going temperament had an invincible repugnance to anything unpliable.

TV is a very fixed, unpliable medium. 

The court coteries did not yet venture to assail these unpliable men; and it is a merit in the King that he held a protecting hand over their integrity.

They are clumsy to place, burdensome to carry, and stiff and unpliable to the chafing point.