1. Not anticipated
   "unanticipated and disconcerting lines of development"
   - unforeseen, unlooked-for, out of the blue

See also: unexpected

• front burner
• front crawl
• front door
• front end
• front entrance
• front line
• front man
• front matter
• front porch
• front projector
• front room
• front tooth
• front yard
• front-porch campaign
• front-porch campaigning
• front-runner
• frontage
• frontage road
• frontal
• frontal bone
• frontal cortex
• frontal eminence
• frontal gyrus
• frontal lobe
• frontal lobotomy