whisper, whispering; private or secret talk

to whisper

exchange (messages, greetings, etc.) / to do with each other (promise, handshake, etc.) / cross, intersect

with each other, with one another

library (building)

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)

library science

librarian, library clerk