inexorable (adj.) 1550s, from Middle French inexorable and directly from Latin inexorabilis "that cannot be moved by entreaty," from in- "not, opposite of" (see in- (1)) + exorabilis "able to be entreated," from exorare "to prevail upon," from ex- "out" (see ex-) + orare "pray" (see orator). ...
exorable (adj.) 1570s, "susceptible of being moved by entreaty" (a word much rarer than its opposite and probably existing now only as a back-formation from it), from Latin exorabilis "easily entreated, influenced by prayer," from exorare "to persuade" (see inexorable) ...
1. What's the meaning of 'pray' as bolded above? Is it the modern one of prayer, or the olden one?
2. How did the 2 syntagma (ex- "out" + orare "pray") combine to mean
exorare "to prevail upon,"? I don't understand this key link in the etymology.