SINISTROUS

Etymology

Adjective

sinistrous (comparative more sinistrous, superlative most sinistrous)

(archaic) On the left side; inclined to the left; sinistral.

(archaic) wrong; absurd; perverse

Source: Wiktionary

Sin"is*trous, a. Etym: [See Sinister.]

1. Being on the left side; inclined to the left; sinistral. "Sinistrous gravity." Sir T. Browne.

2. Wrong; absurd; perverse. A knave or fool can do no harm, even by the most sinistrous and absurd choice. Bentley.

Source: Webster’s Unabridged Dictionary 1913 Edition