English
fissionless
From fission + -less.
Formed from fission + -less
Proto-Indo-European *bʰeyd- ‘to split’
…
Proto-Italic *findō ‘to split, cleave’
Latin findō ‘split, divide’
Latin fissiō ‘the act of breaking up’
Latin fissiōnem
English fission
Today it means
adj Without fission.
Language periods are conventional ranges, not dates for this word.
Etymograph / fissionless