[ soh-ber-sahy-did ]
/ ˈsoʊ bərˌsaɪ dɪd /
solemn or grave in disposition, attitude, character, etc.; serious-minded.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for sobersided
Having no male acquaintances in London, except two sobersided bankers, he is at a loss for seconds.