[with object]To entreat (a person) earnestly; to implore, beseech, supplicate; to beg (a thing).
Origin
Late 16th century. From classical Latin obsecrāt-, past participial stem of obsecrāre to beseech, entreat, implore from ob- + sacrāre to make sacred, hence lit. ‘to beseech in the name or for the sake of something sacred’.