Merriam-Webster's Word of the Day - July 19 Jul 19, 2024 4:44:59 GMT -6 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by NerdiestKen on Jul 19, 2024 4:44:59 GMT -6 Nonplus (v)To nonplus someone is to perplex them, or in other words, to cause them to be at a loss as to what to say, think, or do.