παρείκειν
From LSJ
ὡς μήτε τὰ γενόμενα ἐξ ἀνθρώπων τῷ χρόνῳ ἐξίτηλα γένηται → in order that so the memory of the past may not be blotted out from among men by time
Lexicon Thucydideum
aditum praebere, to provide access, 3.1.1,
qua locus daretur., where opportunity was given. 4.36.2, [vulgo commonly παρῆκον]