'unpredictably-positioned' originates from the combination of 'unpredictable' and 'positioned'. 'Unpredictable' comes from Latin 'un-' meaning 'not' and 'predict' from 'praedicere' meaning 'to say beforehand'. 'Positioned' comes from Latin 'positio' meaning 'placement'.

'Unpredictably-positioned' evolved from the combination of 'unpredictable' and 'positioned', which were used separately in English before being combined to describe something placed in an unexpected manner.

Initially, 'unpredictable' meant 'not able to be predicted', and 'positioned' meant 'placed'. Together, they describe something placed in a manner that cannot be anticipated.