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.

ضعف ‘double’

Arabic

References: Alm. MS Tunis: . – PH Morelon: I.9:4, 29:13
Translation of:
Greek: διπλωθείς [PH Heiberg: I.9:4, 82:18]
Greek: διπλασίων [Alm. Heiberg: I.10, 47:17]
Modern translations:
French: double [PH Morelon: I.9:4, 28:18]
German: doppelt [PH Nix: I.9:4, 83:20]