pensive
Pronunciation: /ˈpensiv/
adjective
engaged in, involving, or reflecting deep or serious thought:a pensive mood
Origin:
late Middle English: from Old French pensif, -ive, from penser 'think', from Latin pensare 'ponder', frequentative of pendere 'weigh'

Photo Credit:
Steven N. Fettig
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Arnold was always mentally engaged. He invented many actual implements, but the fun was the thinking part.
His current
pensive passion was centered on how to make a pen sieve, one which would help keep his pen collection organized by ink color.
[ "Hum..." pondered Marco,
pensively. "I wonder when Rodin will finish today's session. This 'sober meditation' pose is getting to me. I need a drink, maybe three. Where did I leave my clothes, anyway?" ]
Words are a game. Sometimes I play alone, but I encourage YOU to play, too.