therbligEtymologyBy partial reversal of the name of its inventor, F. B. Gilbreth, American engineer.therblig means Any of a set of fundamental motions required for a worker to perform a manual operation. Lexicurio rates it Sui generis — a strength score of 89 out of 100.nounAny of a set of fundamental motions required for a worker to perform a manual operation.“Minimize your therblig until it becomes automatic; this doubles your effective lifetime—and thereby gives time to enjoy butterflies and kittens and rainbows.”