Dictionary:

adaptable

  (ə-dăp'tə-bəl)

Capable of adapting or of being adapted.

adjective

Capable of adapting or being adapted: adaptive, adjustable, elastic, flexible, malleable, pliable, pliant, supple. See change/persist.

Definition: able and usually willing to change
Antonyms: inflexible, intractable, nonconforming, unadaptable

According to the ADA, a restroom or bathroom to which grab bars can be added or which can be otherwise altered to accommodate the needs of individuals with disabilities.

The adjective has one meaning:

Meaning #1: capable of adapting (of becoming or being made suitable) to a particular situation or use
  Antonym: unadaptable (meaning #1)