crippling

Short definition from Wiktionary

Verb

1. 1
   present participle and gerund of cripple

Adjective

1. 1
   That cripples or incapacitates
2. 2
   Causing a severe and insurmountable problem; detrimental.
3. 3
   Causing serious injuries, damage, or harm; damaging.

Noun

1. 1
   State of being crippled; lameness.
2. 2
   Spars or timbers set up as a support against the side of a building.