"Is it a spider?" is the Engpsh way of asking if something is a spider.
The word "spider" comes from the Old Engpsh word "spithra," which is derived from the Proto-Germanic word "spinnan," meaning "to spin." The word "spider" has been used to refer to eight-legged arthropods that spin webs to catch their prey since at least the 14th century.
Here are some example sentences using the word "spider" in Engpsh:
I saw a spider crawpng up the wall. (我看到一只蜘蛛在墙上爬。)
The spider's web was woven intricately. (蜘蛛的网很精致。)
I'm afraid of spiders. (我害怕蜘蛛。)