1) Albatross 2) Bind 3) Constraint 4) Defensive 5) Hindrance 6) Impediment 7) Millstone 8) Obstacle 9) Preventative 10) Straitjacket 11) Warning 1) Big stick is one 2) Convincing counterthreat 3) Discouragement 4) Discouraging force 5) Hindrance 6) It acts to discourage 7) Preventative 8) Preventive 9) Serving or tending to deter 10) Standoff factor 11) Tending to deter 
• (a.) Serving to deter. • (n.) That which deters or prevents.
De·ter'rent adjective [ Latin deterrens , present participle of deterrere . See Deter .] Serving to deter. 'The deterrent principle.' E. Davis. 
[adj] - tending to deter
adjective tending to deter; `the deterrent effects of high prices`
serving or tending to deter.
tending to prevent something immaterial that interferes with action or progress