]]> worried. to discover; to find out for certain. to take upon oneself; to believe to be true. a period of ten years. to interrogate; to scrutinize. to try out a new procedure or idea; a test or trial. formally valid; using orderly reasoning. the act of collecting information about a particular subject.. a task. to find a solution, explanation, or answer. an administrator in charge. systematically adv., methodically; following a system.