νυκτερεύω
From LSJ
ψυχῶν σοφῶν φροντιστήριον → thought-shop of wise souls
English (LSJ)
(νύκτερος)
A pass the night, Id.Cyr.4.2.22 ; ν. ἀθλίως Timocl.16.1 ; of troops, bivouac, X.An.4.4.11 ; ἐν τοῖς ὅπλοις ν. ib.6.4.27 :—so in Med., pass a sleepless night, Timachid. ap. Ath.15.699e.