Canto legato

Legato singing is the acid test of technique. It is achieved by very
steady support, singing on the breath and the net effect is to tie all
the notes together with no break caused by bumps in the air (support)
not the intrusion of any consonant - so the consonants have to be
pronounced quickly and precisely without any excess movement of the
tongue to disturb the air flow.  florid singing is produced on the
breath, and requires a steady air flow, and the use of even less breath.