mulling russian

• мусо́лящий

  chewing, mouthing, gumming

  dwelling on, rehashing, mulling over

• обсусоливающий

  dwelling on, mulling over, overthinking, verbose (about discussions)

• пережёвывавший

  chewing, masticating, that was chewing

  ruminating, pondering, mulling over, that was pondering