"clown, clodhopper," 1530s, from clump (n.), probably on model of simpleton.
club-moss
cluck
clue
clueless
clump
clumperton
clumpy
clumsy
clung
clunk
clunker
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}