%livelong%

a. [ For lifelong. Cf. Lifelong. ] 1. Whole; entire; long in passing; -- used of time, as day or night, in adverbial phrases, and usually with a sense of tediousness. [ 1913 Webster ]

The obscure bird
Clamored the livelong night. Shak. [ 1913 Webster ]

How could she sit the livelong day,
Yet never ask us once to play? Swift. [ 1913 Webster ]

2. Lasting; durable. [ Obs. ] [ 1913 Webster ]

Thou hast built thyself a livelong monument. Milton. [ 1913 Webster ]