A snug fit is a join tight enough that nothing moves. Aim for a snug fit.
It is tight without being forced, and forcing it is what splits the wood. A snug fit in joinery is made by cutting slightly large and taking material off.
1nounsnug fitA join tight enough that nothing moves.
“It was a snug fit and needed no glue at all.”
snug fit is a fit.
Practised in Tools & DIY