What is the meaning of Denn?

for; because; since

than

then, ever, but, now used for emphasis or to express interest, surprise or doubt, or in rhetorical questions

thus, so; expresses a consequence; see usage notes

then, after that, in that case

unless (marks a negatively exceptive clause, with subjunctive)

den or lair

a woodland pasture for swine

thin, slim, skinny, slender, lean, gaunt

sparse

Source: wiktionary.org