壅 壅 yong1
to obstruct; to stop up; to heap soil around the roots of a plant

strokes 16
radical
土
土
strokes after radical 13
壅蔽 壅蔽 yong1 bi4
(literary) to cover; to conceal; to hide from view

壅塞 壅塞 yong1 se4
variant of 擁塞|拥塞