The Merriam-Webster Word of the Day on September 9, 2025, is "insinuate." It's a verb with two main meanings. First, it means to subtly suggest something negative or offensive indirectly. Second, it means to gradually and often deceptively integrate oneself into a group or situation. The word's usage is illustrated by examples of accusing students of cheating and people infiltrating social circles. A news article example highlights the use of "insinuate" in relation to rumors about a beach's unwelcoming atmosphere. The word's etymology is rooted in the Latin "sinuare," meaning "to bend or curve." This reflects the indirect and winding nature of insinuating something. The Latin root "sinus" also connects to other words like "sine," "cosine," "sinuous," and "sinus." The dual meanings highlight the subtle and often manipulative nature of the action.