From Old Irish caisel, from Latin castellum.
caiseal m (genitive singular caisil, nominative plural caisil)
- (ancient) stone fort
- unmortared stone wall
- (of church, cemetery) boundary wall
- ‘clamp’, built-up sods, on stack of turf
- (chess) rook, castle
- (architecture, of column) cincture
- spinning top
|Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.
- "caiseal" in Foclóir Gaeilge-Béarla, An Gúm, 1977, by Niall Ó Dónaill.
- “caisel” in Dictionary of the Irish Language, Royal Irish Academy, 1913–76.