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.)

one

adjectival equative: same, sharing [base], having the same [base]

all, the whole [base]

intransitive verbal prefix

1. immediative

   immediative

   as much as

   apart-, aside-, away-

   without, lacking, wanting, -less

   six- as a bound morpheme

   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