malfunction; breakdown; defect; shortcoming; fault; failure; impediment; error; bug (in software)

to ensure; to guarantee; to safeguard

roadblock; barricade

learning difficulties (handicap); retarded

barrier

handicapped

obstacle; hindrance

diversionary tactic; smokescreen

to surmount obstacles; assault course for training troops

cataract (ophthalmology)

to block; to hinder; to obstruct

karmic hindrance (Buddhism); karmic consequences that stand in the way of enlightenment; (term of abuse, especially toward the younger generation) devil spawn; (fig.) money

hearing impairment

evil creature

mental disorder (abbr. for 精神障礙|精神障碍[jing1 shen2 zhang4 ai4]) (Tw)

visual impairment

(of a robot, autonomous vehicle etc) to avoid obstacles

barrier

to hinder the eyesight; (fig.) to trick into not noticing

to obstruct

Mara (the demon of temptation)

barrier-free; (esp.) accessible (to people with a disability)

water hazard (golf)

steeplechase (athletics)

lit. eyes obscured by a single leaf (idiom); fig. not seeing the wider picture; can't see the wood for the trees

safeguards

single point of failure

bipolar disorder

technical breakdown; malfunction

cultural barrier

intellectual disability; cognitive disability; learning disability; mental retardation

person with learning difficulties (handicap); retarded person

social security

language barrier; speech impediment

quality assurance (QA)

disability

dyslexia

(snow skiing) slalom

blood brain barrier

aplastic anemia (med.)

erectile dysfunction (ED)

gender identity disorder (GID); gender dysphoria

gender identity disorder

schizoaffective disorder

post-traumatic stress disorder; PTSD

borderline personality disorder (BPD)