安穏[annon] peace
穏やか[odayaka] calm
穏健[onken] quiet
穏当[ontou] proper
穏便[onbin] gentle

静穏[seion] serene
不穏[fuon] unrest
不穏当[fuontou] impropriety
不穏分子[fuonbunshi] disturbing elements
不穏文書[fuonbunsho] inflammatory pamphlets