self-denying (adj.)

• abstinent
• altruistic
• anchoritic
• ascetic
• austere
• committed
• consecrated
• dedicated
• devoted
• disinterested
• eremitic
• humble
• mendicant
• modest
• puritanical
• sacrificing
• self-abnegating
• self-effacing
• self-forgetful
• self-sacrificing
• selfless
• unacquisitive
• unpretentious
• unselfish