0 mysterious and not allowing people to know what you are thinking:
The buildings, solid, massive and often sphinx-like, with an unmistakable sense of compression, also took themselves pretty seriously.
The mender of nets became a far-off sphinx-like figure.
His face was imperturbable, even sphinx-like in its steadiness.
The grim switchboard flashed its metallic face in cryptic, sphinx-like immobility.
After a moment of sphinx-like communing, she dropped her cigarette and rose.
In an agony he tried to call, but no sound escaped the lips, set in a sphinx-like silence.
This is, then, the first form of art-symbolic art with its endless quest, its inner struggle, its sphinx-like mystery, and its sublimity.
Bug buttoned up his lips for a sphinx-like secrecy.