1398. Trevisa, Barth. De P. R., XVI. v. (Bodl. MS.). Þe onynge is vnseperable so þat þei mowe not afterward be parted atwynne.
1532. More, Confut. Tindale, Wks. 495/1. Was himself companion to saynt Poule, & that so continuall and so vnseparable, yt he neuer departed from him?
1561. T. Hoby, trans. Castigliones Courtyer, IV. Xx iij b. This is the beawtye vnseperable from the high bountye.
1587. Golding, De Mornay, v. 67. Fire hath in it both heate and brightnesse vnseparable.
1645. Milton, Divorce (ed. 3), I. i. 7. The first institution will be objected to have ordaind marriage unseperable.
1697. Jeremy Collier, Ess. Mor. Subj., I. 5. Self-love is an unseparable Passion of humane nature.
1737. Gentl. Mag., VII. 14/2. Placed between two Words joyned together in unseparable Concord.
Hence Unseparableness.
1587. Fenner, Def. Ministers, 116. Hee maketh the case of both alike in regarde of the propertie and vnseparablenes of the bande.