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.

lose ‘free’

German. – Grammar: adj.

References: PH Nix: II.8, 120
Translation of:
Arabic: مرسل [Plan. Hyp.: II.8]
Synonyms:
frei[Plan. Hyp.: II.8, 120]
trennen[PH Nix: I.2:4, 73:34]