implore

Short definition from Wiktionary

Verb

1. 1
   To beg or plead for (something) earnestly or urgently; to beseech.
2. 2
   To beg or plead that (someone) earnestly or urgently do something; to beseech, to entreat.
3. 3
   Often followed by for (a thing) or of (a person): to express an earnest or urgent plea.

Noun

1. 1
   An act of begging or pleading earnestly or urgently; an entreaty, an imploration or imploring, a plea.