English

equisedative

From equi- + sedative.

Old Latin aiquos

Latin aequus ‘equal’

English equi-

Proto-Indo-European *sed- ‘to sit’

…

Latin sēdō ‘to allay, settle, still, calm, assuage or…’

Medieval Latin sēdātīvus ‘calming, allaying’

Anglo-Norman sedatif

Middle English sedatif

Today it means

adj equally sedative

Language periods are conventional ranges, not dates for this word.

Etymograph / equisedative