untumultuous
adjUK /ʌntəˈmʌltjuːəs/
Etymology From un- + tumultuous.
1
Not tumultuous; calm, placid.
- the wide sea did weave / An untumultuous fringe of silver foam / Along the flat brown sand.1818, John Keats, To J. H. Reynolds, Esq.:
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.