The correct term is just components. Characters aren't comprised of radicals (部首; section header). Radicals are just modern stroke-shapes used as indexing tools to mark the heading (首) of dictionary sections (部), equivalent to the first letter of an English word when you look it up in a dictionary ("A", "B", "C", etc.), and may not be related to the character at all.

Since a character isn't indexed under more than one radical in a dictionary, we also don't speak of characters having multiple radicals, just like English words don't have more than one first letter.

時期 字體	字形	參考資料
戰國・楚 簡		11 曾侯竹簡
篆		秝部 說文解字
東漢 隸		衡方碑
楷

「兼」 is a picture of a hand 「又」 simultaneously grasping two cereal plants 「禾禾」, indicating the meaning simultaneously, concurrently.

Be wary of the shape changes in 「兼」 over the course of history: 「又」 is still present in the middle of 「兼」 and now looks like 「⋺」, while the top of 「禾禾」 has been reduced to 「䒑」.

The correct term is just components. Characters aren't comprised of radicals (部首; section header). Radicals are just modern stroke-shapes used as indexing tools to mark the heading (首) of dictionary sections (部), equivalent to the first letter of an English word when you look it up in a dictionary ("A", "B", "C", etc.), and may not be related to the character at all.

Since a character isn't indexed under more than one radical in a dictionary, we also don't speak of characters having multiple radicals, just like English words don't have more than one first letter.

時期 字體	字形	參考資料
戰國・楚 簡		11 曾侯竹簡
篆		秝部 說文解字
東漢 隸		衡方碑
楷

「兼」 is a picture of a hand 「又」 simultaneously grasping two cereal plants 「禾禾」, indicating the meaning simultaneously, concurrently.

Be wary of the shape changes in 「兼」 over the course of history: 「又」 is still present in the middle of 「兼」 and now looks like 「⋺」, while the top of 「禾禾」 has been reduced to 「䒑」.