This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鼿 combines 鼻 (nose) with 兀, but the exact historical development and original meaning are uncertain.
The kanji visually contains 鼻 (nose) and 兀 (a high, bald shape). Without a clear meaning, picture a nose so high it becomes bald on top.
For ゴツ, imagine a nose so large it looks like a gothic statue: gothic -> ゴツ, and the nose is the prominent feature.