Usage Note
Sus survives mainly in fixed legal and administrative phrases: sus-mentionné (above-mentioned), sus-cité (cited above), en sus de (in addition to). In modern spoken French it is not used as a standalone adverb; learners encounter it almost exclusively in written legal texts.
Examples
"Les frais en sus seront facturés séparément."
Natural Translation
Additional charges will be billed separately.
Literal Translation
The charges in addition will be billed separately.

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