The word "拍子" is formed by combining the character "拍", meaning to pat, clap, or strike, with the character "子", which acts as a nominalizing suffix to denote a thing or tool. This construction yields a noun that refers to a beat or meter in musical rhythm or, in other contexts, an implement like a racket used for hitting. The meaning arises directly from the action implied by "拍" and the grammatical role of "子" in forming concrete nouns.