MEANING: adjective: Relating to the essential nature of something or someone.

ETYMOLOGY: From Latin quid (what), which also gave us quidnunc, quid pro quo, and quiddity. Earliest documented use: 1600.

"QUIDDIT!" ACTIVE - an unmistakable order to stop

SQUIDDITATIVE - behaving like a tentacled marine cephalopod

QUADDITATIVE - transforming into a four-part entity