'tastelessly-organized' is a compound word formed from 'tastelessly' and 'organized'. 'Tastelessly' originates from 'tasteless', which comes from the Old English 'tæst', meaning 'to touch, taste'. 'Organized' comes from the Greek 'organon', meaning 'tool, instrument'.

The word 'tastelessly' evolved from the Old English 'tæst', while 'organized' evolved from the Greek 'organon'. The combination of these words into 'tastelessly-organized' is a modern English construct.

Initially, 'tasteless' referred to lacking flavor, but it evolved to mean lacking aesthetic appeal. 'Organized' has maintained its meaning of being arranged or structured.