Not flexible; stiff or unbending.

• Resisting bending, stretching, or twisting.
• Fixed in shape or position.

Very strict or exact; not allowing change.

• Inflexible in opinions or behavior.
• Enforced with harsh or unyielding standards.

An airship with a load-bearing internal framework.

• Its shape is kept by structure, not gas pressure.

A bicycle without suspension.

• No front or rear suspension is present.