cay / key / ki / quai (quay) [ki:]
cay – n. – a low insular bank of sand, coral etc.
key – adj. & n. – adj. – essential, dominant, of critical importance; n. – (many meanings in different fields both literal and figurative) 1. an instrument used to lock or unlock something; 2. any of various devices resembling or functioning as a key (key card, key code); 3. individual component of a typewriter or computer keyboard; 4. a phonetic shortening of "kilo," referring to a kilogram of some illicit drug
ki – n. – 1. variant of chi, the circulating life energy that in Chinese philosophy is thought to be inherent in all things; 2. the Sumerian goddess personifying earth: the counterpart of the Akkadian Aruru
quai – n. – 1. French ministry of foreign affairs with its headquarters on the Quai d’Orsay, a street near the Seine River in Paris; 2. alternate spelling of quay; 3. solid, stationary man-made landing place alongside or projecting into the water for loading and unloading cargo