so·ber·ing 
/ˈsoʊbərɪŋ/ adjective
/ˈsoʊbərɪŋ/ adjective [more sobering; most sobering] : making you feel serious and thoughtful
▪ His death is a sobering reminder of the dangers of mountaineering. ▪ a sobering fact/thought
▪ His death is a sobering reminder of the dangers of mountaineering. ▪ a sobering fact/thought
