English
prolongable
From prolong + -able.
Today it means
adj Capable of being prolonged, extended, or lengthened.
Sources
Sources: Wiktionary, “prolongable”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / prolongable