The act of beseeching; an earnest plea or supplication.
From 'beseech' plus the noun-forming suffix '-ment,' which creates abstract nouns from verbs. The '-ment' suffix (used in 'agreement,' 'payment,' 'movement') indicates an action or its result.
This is an archaic but poetic way to refer to the act of pleading itself—not the person begging, but the actual moment of begging. Medieval legal documents might use 'beseechment' to describe formal petitions to authorities.
Complete word intelligence in one call. Free tier — 50 lookups/day.