self-sustaining vs single-handed

self-sustaining

• Able to provide for one's own needs without help from others; self-sufficient. 

• Able to sustain itself without the need for additional fuel. 

• Opposing or rejecting exterior influence; independent. 

single-handed

• Without help from others; unassisted. 

• Using only one hand. 

• Designed for only one hand. 

• In a single-handed manner.