PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

underlying <reality> ‘assume, establish (in reality, as model)’

English

References: PH Hamm: I.1:4, 45:8
Translation of:
Greek: ὑπόκειμαι [PH Heiberg: I.1:4, 70:21; I.4:4, 76:13]