1. Fit to be certified as insane (and treated accordingly)
   - certified 
2. Capable of being guaranteed or certified
   "a certifiable fact"

See also: certified, certify, insane

• half-hardy
• half-heartedly
• half-heartedness
• half-holiday
• half-hour
• half-hourly
• half-intensity
• half-length
• half-life
• half-light
• half-mast
• half-moon
• half-pay
• half-pint
• half-price
• half-relief
• half-seas-over
• half-size
• half-slip
• half-staff
• half-term
• half-timber
• half-timbered
• half-tracked
• half-truth