An obsolete or archaic term meaning 'pertaining to or resembling a servant or bondsman,' derived from Latin roots.
From Latin amanuensis (a scribe or secretary), related to servus (servant). The suffix -ous was added to create an adjective form, though this usage is extremely rare in modern English.
This word is basically obsolete, but it shows how Latin servant-terminology got transformed through multiple languages—the root 'manus' meaning hand is in there because servants literally did manual work.
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