Re·gard'ful adjective Heedful; attentive; observant. -- Re*gard'ful*ly , adverb « Let a man be very tender and regardful of every pious motion made by the Spirit of God to his heart.» South. Syn. -- Mindful; heedful; attentive; obs... Found on http://www.encyclo.co.uk/webster/R/38