empoisoning
/ɪmˈpɔɪz(ə)nɪŋ/ /ɛmˈpɔɪz(ə)nɪŋ/Now rare (somewhat archaic in later use)
noun
The action of poisoning or the fact of being poisoned; an instance of this.
Origin
Late Middle English; earliest use found in Geoffrey Chaucer (c1340–1400), poet and administrator. From empoison + -ing.