sinnes

Etymology
From, the same terminative suffix as seen in.

Conjunction

 * 1) until then, theretofore

Etymology 1
, in turn from +  +.

Adjective

 * 1)  insane, mad

Declension
Invariable, not used in the definite form.

Etymology 2
Either a or an adverbial form of the adjective.

Adverb

 * 1)  insanely, madly