牽く[hiku] to pull
牽引[kenin] hauling
牽引車[keninsha] tractor
牽引力[keninryoku] pulling power
牽強[kenkyou] distortion of facts

牽強付会[kenkyoufukai] farfetched (argument, opinion)
牽制[kensei] check
牽制球[kenseikyuu] throw to check a runner
牽束[kensoku] restraint
牽連[kenren] related to