All boards are fitted with a special 'male' and a 'female' extrusion screwed to each long side and these sections lock into each other when laid next to each other.
Ideally, you want to "lock into" your position before taking the load on your back.
The pieces of the puzzle lock into each other/lock together, ie interlock.
The parts lock into each other.
The hole in a lock into which a key fits.
"The sea level rise is a much slower thing, so it will take a long time to happen, but we will lock into it, based on the peak level of [carbon dioxide] we reach in this century," Solomon says.
Wake up pear flower tears, dream flowers intoxicated, a tear drunk, your destruction, let the heart lock into the ark of the year. This life, do not forget! You owe me a spun and a red tear.