sûrement

/syʁ.mɑ̃/
1.
adverb

probably

most likely

Il est sûrement déjà rentré chez lui.

He has probably already gone back home.

Synonyms:probablement, sans doute, vraisemblablement
2.
adverb

certainly

surely

Ne t'inquiète pas, je t'aiderai sûrement.

Don't worry — I'll certainly help you.

Synonyms:certainement, assurément, sans aucun doute