thromb/o
thromb/o means clot (Greek).
"THROM-boh." Coach: "Thromb means a clot or a cell involved in clotting."
Examples: thrombosis, thrombus, thrombocyte, thrombocytopenia, thrombocytosis.
Also: thrombolysis, thrombolytic, thrombectomy, thrombophlebitis, thromboembolism.