noun which may take the genitive case particle 'no', na-adjective
continuous; incessant; without interruption
Describes something that goes on without stopping, often used adverbially as ひっきりなしに. Common with verbs like 続く, 鳴る, 来る, etc.
The phone is ringing incessantly.
ひっきりなしに客が来るので、休む暇がない。
Customers come without interruption, so I have no time to rest.