What is the meaning of Se-?

a prefix, sometimes used instead of s- in front of a consonant

none, no (person​/​thing​/​way​/​kind​/​place​/​size​/​amount​/​etc.)

Reduced form of satu; one, a.

Functions as adjectival equative: same, sharing [base], having the same [base].

All, the whole [base].

Functions as intransitive verbal prefix: just as, as.

1. Used to form immediative constructions: as soon as.

   Used to form immediative constructions: as soon as.

   Used to form constructions, indicating maximum relative extent: as much as, as far as.

   apart-, aside-, away-

   without, lacking, wanting, -less

   six- as a bound morpheme

   alternative form of sēmi- occurring in sēlībra and sēmodius

   one

   used to form the equative of adjectives

   Used on nouns to indicate that the noun referred to is in its entirety.

   Class 7 noun prefix.

   Class 7 noun prefix.

   Class 7 noun prefix.

   Form of sa- used in copulative constructions.

   Source: wiktionary.org