'often-thought' originates from the combination of 'often,' meaning 'frequently,' and 'thought,' meaning 'considered or pondered.'

The word 'often' comes from Old English 'oft,' while 'thought' comes from Old English 'þoht,' both of which have retained their meanings over time.

Initially, 'often' meant 'frequently,' and 'thought' meant 'considered or pondered,' which have largely remained the same in modern usage.