the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving); "the priest sank to his knees in prayer"
necessarily or demonstrably true; "demonstrable truths"
capable of being demonstrated or proved; "obvious lies"; "a demonstrable lack of concern for the general welfare"; "practical truth provable to all men"- Walter Bagehot
able to attract interest or draw favorable attention; "He added an appealing and memorable figure to popular American mythology"- Vincent Starrett; "an appealing sense of humor"; "the idea of having enough money to retire at fifty is very appealing"
expressing earnest entreaty; "the appealing and frightened look worn by an injured dog"; "she holds out her hand for money, importunate, insistent"; "a pleading note in her voice"
having a bearing on or connection with the subject at issue; "the scientist corresponds with colleagues in order to learn about matters relevant to her own research"
an intricate knot tied by Gordius, the king of Phrygia, and cut by the sword of Alexander the Great after he heard that whoever undid it would become ruler of Asia
any very difficult problem; insoluble in its own terms