Liddell-Scott-Jones

ἔρεισμα (ereisma) a support ^G:N-N

ἔρεισμα-εισμα, ατος, τό,

prop, stay, support, [Refs 5th c.BC+]; ἀμφὶ βάκτροις ἔρεισμαεισμα θέμενος,=ἐρεισάμενος, [Refs], stays of a house, [Refs 5th c.BC+]; props to keep a boat on shore upright (compare ἕρμα), [Refs 3rd c.BC+] strong knots, [Refs 5th c.BC+]; of the legs which support the body, [Refs 4th c.BC+]; of the framework of the body, [Refs]; of food, [Refs].

__2 metaphorically, of a person, Θήρων᾽ ἔ. Ἀκράγαντος pillar of Agrigentum, [Refs 5th c.BC+]
__2.b of good fortune, [Refs 2nd c.AD+].
__II contusion, [Refs 5th c.BC+]