only option

• last resortFinal available option
• no alternativeSole available course
• necessityIndispensable requirement
• inevitableCertain to occur
• corneredUnable to flee

forced hand · trapped · stuck · desperate · ultimatum · final answer · one way · dead end · backup plan · fallback · compromise · accept · surrender · reluctant · limited · constraint · pressure · must

• tight spotstight spot, corner, trapped, stuck, boxed in