English

interseismic

From inter- + seismic.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *twéys-e-ti

Proto-Hellenic *tséihō

Ancient Greek σείω ‘to shake’

Ancient Greek σεισμός ‘shaking, earthquake’

Today it means

adj Between seismic events (especially between earthquakes)

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

Etymograph / interseismic