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.

الذي لا يخالطه غيره ‘unmixed’

Arabic

References: PH Morelon: I.5:1, 21:13
Translation of:
Greek: ἀμιγής [PH Heiberg: I.5:1, 76:21]
Modern translations:
French: dans lequel ne se présente aucun mélange avec d'autres  [PH Morelon: I.5:1, 20:20]
German: mit dem keine anderen vermischt ist [PH Nix: I.5:1, 77:24]