"sintemal" is very old-fashioned for "since, because".

The other one is not known to me.

Although the context suggests "more intimidating".

... or "more intimidated" ?

Thanks. Timider makes me think of timid in English, but it doesn't make sense in the context.

timide = schüchtern, zaudernd, furchtsam = shy, timid, fearful
timider = Komparativ =>
die timidere Partei = the party of the (more) fearful ones

Peter saves the day again!

The pleasure's mine.

Have a nice evening!