The Collaborative International Dictionary
Lastingly \Last"ing*ly\, adv. In a lasting manner.
Wiktionary
adv. In a lasting manner, in a way that persists.
WordNet
adv. in an enduring or permanent manner
Usage examples of "lastingly".
If we should be interested in the specific question of human walking - how it is achieved, how it is acquired, and how it may be impaired temporarily by over consumption of alcohol or lastingly by brain damage - studying fairy tales about flying carpets or the principles of the internal combustion engine, or even the wave forms of snake tracks, will be of only limited assistance.
The gates stood lastingly ajar on a heap of rubble, and the Ila’s Mercy spilled out a flood that wet the cracked pavings and seeped into the thirsty sand.
No few who were less prolific or less widely acclaimed gave us classic works, pervasively and lastingly influential.