Where does “πικρόγλωσσος” come from?

πικρόγλωσσος (Ancient Greek) comes from Ancient Greek γλῶσσα, from Old Norse glotta, from Proto-Germanic glutōną, from Proto-Indo-European ǵʰel- — to shine, glimmer, glow; to shimmer, gleam;...

πικρόγλωσσος (Ancient Greek): of sharp or bitter tongue

Definitions

of sharp or bitter tongue

Ancestry of “πικρόγλωσσος”, step by step

πικρόγλωσσος traces back through two separate lines of ancestry.

via Ancient Greek γλῶσσα

Step	Language	Word	Meaning
1	Ancient Greek	γλῶσσα	a tongue; a language; the mouthpiece of a pipe
2	Old Norse	glotta	to grin, smile scornfully
3	Proto-Germanic	glutōną	To stare; gawk
4	Proto-Indo-European	ǵʰel-	to shine, glimmer, glow; to shimmer, gleam;...

via Ancient Greek πῐκρός

Step	Language	Word	Meaning
1	Ancient Greek	πῐκρός	pointed, sharp, keen

Every word from Proto-Indo-European ǵʰel- →Every word from Proto-Germanic glutōną →Every word from Old Norse glotta →