What does upheave mean?
Upheave means (transitive) To heave or lift up; raise up or aloft..
Pronunciation varies by accent · verb
(transitive) To heave or lift up; raise up or aloft..
Considering, further, the absence of most of the New Guinea mammals from the Moluccas, we are led to the conclusion that these islands are not fragments which have been separated from New Guinea, but form a distinct insular region, which has been upheaved independently at a rather remote epoch, and during all the mutations it has undergone has been constantly receiving immigrants from that great and productive island.
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Upheave means (transitive) To heave or lift up; raise up or aloft..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Considering, further, the absence of most of the New Guinea mammals from the Moluccas, we are led to the conclusion that these islands are not fragments which have been separated from New Guinea, but form a distinct insular region, which has been upheaved independently at a rather remote epoch, and during all the mutations it has undergone has been constantly receiving immigrants from that great and productive island.
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