'unceasingly-watched' originates from the combination of 'unceasingly' and 'watched', where 'unceasingly' is derived from 'unceasing', meaning 'without stopping', and 'watched' is the past participle of 'watch', meaning 'to observe'.

'unceasingly' evolved from the Old English 'uncēasung', and 'watched' from the Old English 'wæccan', eventually forming the modern English compound 'unceasingly-watched'.

Initially, 'unceasingly' meant 'without pause', and 'watched' meant 'observed'. Together, they convey the idea of continuous observation.