ictus /ikˈtəs/

1. Rhythmical or metrical stress in contradistinction to the usual stress of a word in prose, etc (prosody)
2. A stroke or sudden attack, esp an epileptic fit (medicine)

• underinsure
• underinsured
• underinsures
• underinsuring
• underinvestment
• under-jaw
• underjawed
• under-jaws
• underkeep
• underkeeper
• underkeepers
• underkeeping
• underkeeps
• underkept
• underking
• underkingdom
• underkingdoms
• underkings
• underlaid
• underlain
• underlap
• underlapped
• underlapping
• underlaps
• underlay