These simple word lookup questions are the bane of anyone who follows a language topic, and they are not differentiated by topic from more substantive questions.
These simple word lookup questions are also Ground Zero for easily Googlable questions, on which see: Is it bad to ask questions on Quora that could easily be answered via a Google search? (Executive Summary: Quora Inc loves them, because they think Quora will replace Google. Many individual users want them to burn in hell.)
Downvoting questions are an acknowledged method to signal questions are low-quality, and a (less widely acknowledged, but necessary) method of controlling your own feed.
Those questions can’t be muted by topic.
They are low quality. Seriously, they are. They only add value to Quora if you think Quora will replace Google (which Adam DiCaprio actually did, in 2010).
I haven’t downvoted them, because I have a very high threshold for downvoting in general. But, IMHO, OP: Be that guy.