Vocabulary consisting only from characters you are able to read
低下
ていか
fall, decline, lowering, deterioration, degradationsuru
下ろす
おろす
(1)to take down (e.g. flag), to launch (e.g. boat), to drop, to lower (e.g. ladder), to let (a person) off, to unload, to discharge, (2)to drop off (a passenger from a vehicle), to let (a person) of godan, verb, vtrans