遂 means to accomplish and is a JLPT N1 kanji. It has 12 strokes and uses the walking / road radical (⻌).
Stroke order · 12 strokes
On'yomi (音読み)
スイ
Kun'yomi (訓読み)
と(げる)、つい(に)
Radical
⻌ · walking / road
Strokes
12
How to remember 遂
Going all the way to the end of the road (⻌) — accomplishment. 遂に!! means "finally!" — the word of announcement after a long wait. やり遂げる means to see something through to completion.