駄目になる[dameninaru] to spoil
無駄にする[mudanisuru] to render futile
駄目押し[dameoshi] making doubly sure
一駄[ichida] horse load
下駄[geta] geta

下駄を預ける[getawoazukeru] to leave everything to (someone)
下駄屋[getaya] clog shop
下駄掛け[getagake] wearing wooden clogs
下駄直し[getanaoshi] repairing clogs
下駄箱[getabako] shoe rack (in genkan)