English

intramercurial

From intra- + mercurial.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁énteros ‘inside, within’

Latin *interus

Latin intrā ‘within’

Middle English mercurial ‘a plant, probably the goosefoot (Chenopodium)’

Today it means

adj Between the planet Mercury and the sun.

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

Etymograph / intramercurial