The 6 components verse is built from, smallest to largest: எழுத்து (letter) -> அசை (beat) -> சீர் (foot) -> தளை (joining rule) -> அடி (line) -> தொடை (rhyme).

A poet doesn't start with a whole verse - they start with a single letter's duration, and build upward through 5 more stages before a line even exists.

எழுத்து, அசை, சீர், தளை, அடி, தொடை.