phlegmatichaving a calm and unexcitable temperament; stolidly unresponsiveHis phlegmatic demeanour during the emergency helped keep others from panicking.NoteHis phlegmatic demeanour during the emergency helped keep others from panicking.Elon.io is an online learning platformWe have an entire course teaching GRE Verbal — Essential Vocabulary grammar and vocabulary.Start learning GRE Verbal — Essential Vocabulary now