G4087–πικραίνω–pikrainō

Husbands, have love for your wives, and be not bitter against them.

πικραίνεσθε pikrainesthe “do be harsh”

And the name of the star is Wormwood: and a third part of the waters became bitter; and a number of men came to their end because of the waters, for they were made bitter.

ἐπικράνθησαν. epikranthēsan “they were made bitter.”

And I went to the angel, and said to him, Give me the little book. And he said to me: Put it in your mouth; and it will make your stomach bitter, but in your mouth it will be sweet as honey.

πικρανεῖ pikranei “it will make bitter”

And I took the little book out of the angel's hand and did as he said; and it was sweet as honey in my mouth: and when I had taken it, my stomach was made bitter.

ἐπικράνθη epikranthē “was made bitter”