IPA: /ruːm/
KK: /rum/
A thin, watery discharge that comes from the eyes or nose, often due to irritation or illness.
She wiped the rheum from her eyes after waking up in the morning.
Rheum originates from Latin 'rheuma' (meaning a flow or discharge), which in turn comes from Greek 'rheuma' (meaning a flow or stream). The word refers to a watery discharge, particularly in a medical context.
Think of 'flow' ('rheuma') to remember that 'rheum' refers to a watery discharge.