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.

ظهر / أظهر ‘display’

Arabic

References: PH Morelon: I.2:2, 17:14
Translation of:
Greek: ἐμφαίνω [PH Heiberg: I.2:2, 72:19]
Modern translations:
French: apparaître [PH Morelon: I.2:2, 16:26]
German: deutlich zu erkennen sein [PH Nix: I.2:2, 73:24]