sobering

[adj] - tending to make sober or more serious
Found on http://www.webdictionary.co.uk/definition.php?query=sobering

sobering

adjective tending to make sober or more serious; `the news had a sobering effect`
Found on http://wordnetweb.princeton.edu/perl/webwn?s=sobering

Sobering

• (p. pr. & vb. n.) of Sober
Found on http://thinkexist.com/dictionary/meaning/sobering/
No exact match found