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.

combine ‘combine’

English

References: Alm. Toomer: 53
Translation of:
Greek: συντίθημι [Alm. Heiberg: I.10, 42:7]
Synonyms:
is combined (T. n.77/p.64), is compounded (LSJ)
is combined (T. n.77/p.64), is compounded (LSJ)