Is the Word Buggered an Adjective?

Is buggered a rude word?

While often used informally as an insult (like “jerk”) or to refer to any ole whachamacallit, bugger has also been used as a more offensive vulgar term for “sodomy.” ... Keep context in mind when using this word or else someone might tell you to bugger off.

Is the word certain an adjective?

As detailed above, 'certain' can be a determiner or an adjective. Determiner usage: Certain people are good at playing (contract) bridge. Adjective usage: I was certain of my decision.