Origin of titmousealtered, influenced, influence by mouse from Middle English titemose, probably from tit-, little + Old English mase, titmouse, akin to German meise
Origin of titmouseAlteration ( influenced by mous mouse ) of Middle English titmose tit- ( probably from Old Norse tittr small peak, pin, titmouse ) mose titmouse ( from Old English māse )
(plural titmouses or titmice)
From Middle English titmose, compound of tit (“small bird") and Old English mÄse (“titmouse"), from Proto-Germanic *maisÇ (compare Dutch mees, German Meise, Old Norse meisingr), from *maisaz (“tiny, puny") (compare Norwegian meis (“skinny weakling")). The plural is formed in imitation of the otherwise unrelated mouse.