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

蘇連[soren] (former) Soviet Union
ドイツ連邦共和国[doitsurenpoukyouwakoku] Federal Republic of Germany (former West Germany)
破天連[pateren] Portuguese Jesuits (in Japan in the 16th century)
一連[ichiren] series
引連れる[hikitsureru] to take along with

英連邦[eirenpou] Commonwealth of Nations (formerly British Commonwealth)
欧州連合[oushuurengou] European Union
家族連れ[kazokuzure] taking the family along
関連[kanren] relation
関連会社[kanrengaisha] associated company