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The Collaborative International Dictionary
Inextinguible

Inextinguible \In`ex*tin"gui*ble\, a. [L. inexstinguibilis: cf. F, inextinguible. See Inextinct.] Inextinguishable. [Obs.]
--Sir T. More.

Wiktionary
inextinguible

a. (context obsolete English) inextinguishable. (15th-17th c.)