Pronunciation: (in-flek'su-bul), [key]
1. not flexible; incapable of or resistant to being bent; rigid: an inflexible steel rod.
2. of a rigid or unyielding temper, purpose, will, etc.; immovable: an inflexible determination.
3. not permitting change or variation; unalterable: inflexible rules.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.