Meaning

adjective lacking taste or flavor or tang

adjective lacking stimulating characteristics; uninteresting

adjective smoothly agreeable and courteous with a degree of sophistication

originFrom Middle English bland, from Old English bland, blond (“blending, mixture, confusion”), from Proto-Germanic *blandą (“a mixing, mixture”), from Proto-Indo-European *bʰlendʰ- (“to grow turbid, dim, see badly, be blind”). Cognate with Icelandic blanda (“a mixture of liquids, especially of hot whey and water”).

Etymology from Wiktionary, CC BY-SA 3.0