'strategically-separated' is a modern English compound formed from 'strategically' (the adverbial form of 'strategic') and 'separated' (the past participle of 'separate').

'strategic' originates from Greek 'strategikos' via Latin and French into Middle English; 'separate' originates from Latin 'separare' which passed into Old French and then Middle English. The compound arose in contemporary English by joining the adverb and past participle to express a deliberate mode of separation.

Each element retained its original sense ('strategic' relating to long-term planning or advantage; 'separate' meaning to set apart). Combined, the compound preserves these meanings to denote something set apart for strategic reasons.