From Longman Dictionary of Contemporary Englishbeseechbe‧seech /bɪˈsiːtʃ/ verb (past tense and past participle besought /-ˈsɔːt $ -ˈsɒːt/ or beseeched) [transitive] literary ASK FOR something/ASK somebody TO DO somethingto eagerly and anxiously ask someone for something SYN beg→ See Verb table
Examples from the Corpus
beseech• I was crouching over these poor men, who were looking-up to me, eyes raised, beseeching.• His voice would beseech, climbing two octaves.• I besought him if the decision went against him to return to the Upper House and do his bit there.• Each commander began to beseech his immediate superior for reinforcements.• But Chan only gave him that anxious and beseeching look I had seen so many times before.• Mr Cottle looked up, his eyes beseeching Mary Ann to find another object for her well-meaning pity.• On one occasion he put his handprints on the painting as if beseeching the canvas to acknowledge the exiled body.Origin beseech (1100-1200) seek 