What is to gird on, to put on; to fasten around or to one securely, like a girdle; as, to gird on armor or a sword. Let not him that girdeth on his harness boast himself as he that putteth it off. 1 Kings xx called?

gird — To gird on, to put on; to fasten around or to one securely, like a girdle; as, to gird on armor or a sword. Let not him that girdeth on his harness boast himself as he that putteth it off. 1 Kings xx. (Webster's 1913.)

Sources