"Indeed, those final three letters, ayin-bet-dalet, form the word עבד (eved), which means slave. It’s also the shoresh (root) of numerous words related to the idea of work, everything from a 9-5 job to worshiping God." (source)

“To figure out a word's meaning, first find the shoiresh.” (Weiser)

“We traced the gemara to its shoiresh in Chumash.” (Weiser)

"what is ahavas yisroel? what is ahava? if we all come from the same shoiresh we dont differentiate." (source)

“The shoiresh of the electrical problem was a mystery to even the chief electrician.” (Weiser)