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/ˌɪndəˈfætəɡəbli/ · adverb
In an extremely persistent and untiring manner; in an indefatigable manner.
Silence, silence,’ the trumpet mouths indefatigably repeated at intervals down every corridor.
Use indefatigably when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Indefatigably means In an extremely persistent and untiring manner; in an indefatigable manner.
Common synonyms include inexhaustibly, tirelessly.
The opposite depends on the specific sense.
Silence, silence,’ the trumpet mouths indefatigably repeated at intervals down every corridor.
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