'plainly-made' originates from the English word 'plainly,' which means 'in a simple manner,' and 'made,' the past participle of 'make,' meaning 'to create or construct.'

'plainly' and 'made' have been used in English since the Middle Ages, with 'plainly' deriving from the Old French 'plain' and 'made' from the Old English 'macian.'

Initially, 'plainly' meant 'clearly' or 'evidently,' but in this context, it evolved to mean 'simply.'