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.

ثابت ‘stationary’

Arabic

References: PH Morelon: I.3:1, 19:4
Translation of:
Greek: μένων [PH Heiberg: I.3:1, 74:6]
Modern translations:
French: fixe [PH Morelon: I.3:1, 18:7]
German: fest [PH Nix: I.3:1, 75:6]