a snake in the grass

someone who pretends to be your friend while secretly doing things to harm you It's upsetting to learn that someone you once viewed as a good colleague is in fact a snake in the grass.

Common Names:

Name	Pronounced	Usage
Konstantina	kon-stahn-DEE-nah	Greek
Rebekka	re-BE-kah (German), RE-bek-kah (Finnish)	German, Dutch, Danish, Norwegian, Icelandic, Faroese, Finnish, Biblical Greek
Janette	JAN-ət, jə-NET	English
Auguste (2)	-	German
Wallis	WAWL-is	English (Rare)
Axel	AHK-sel (German)	Danish, Swedish, Norwegian, German