9 letters · 17 points in Scrabble
adverb taking care or paying attention
adverb as if with kid gloves; with caution or prudence or tact
originFrom Middle English carfulli, carefulliche, from Old English carfullīċe, ċearfullīċe (“carefully, diligently”), equivalent to careful + -ly.
Etymology from Wiktionary, CC BY-SA 3.0