安い[yasui] cheap
安っぽい[yasuppoi] cheap-looking
安らか[yasuraka] peaceful
安らぎ[yasuragi] peace (of mind)
安んじる[yasunjiru] to be contented

安易[ani] easy
安穏[annon] peace
安価[anka] low price
安臥[anga] quiet rest
安楽[anraku] ease

安静[ansei] rest
安静時[anseiji] resting
閑静[kansei] quiet (e.g. neighbourhood, neighborhood)
頸静脈[keijoumyaku] jugular vein
寝静まる[neshizumaru] to fall asleep

静か[shizuka] quiet
静けさ[shizukesa] stillness
静岡県[shizuokaken] Shizuoka prefecture (Chuubu area)
静穏[seion] serene
静観[seikan] watchful waiting