• Adj: definite but not specified or identified; examples: "set aside a certain sum each week", "to a certain degree", "certain breeds do not make good pets", "certain members have not paid their dues", "a certain popular teacher", "a certain Mrs. Jones"
• Adj: having or feeling no doubt or uncertainty; confident and assured; examples: "felt certain of success", "was sure (or certain) she had seen it", "was very sure in his beliefs", "sure of her friends"
• Adj: established beyond doubt or question; definitely known; examples: "what is certain is that every effect must have a cause", "it is certain that they were on the bus", "his fate is certain", "the date for the invasion is certain"
• Adj: certain to occur; destined or inevitable; examples: "he was certain to fail", "his fate is certain", "In this life nothing is certain but death and taxes"- Benjamin Frankli", "he faced certain death", "sudden but sure regret", "he is sure to win"
• Adj: established irrevocably; example: "his fate is sealed"
• Adj: reliable in operation or effect; examples: "a quick and certain remedy", "a sure way to distinguish the two", "wood dust is a sure sign of termites"
• Adj: exercising or taking care great enough to bring assurance; examples: "be certain to disconnect the iron when you are through", "be sure to lock the doors"