In a dependent manner; in a way that shows reliance on others.
From dependent (adjective, from Latin dependens) plus -ly (adverbial suffix). The word formed in parallel to 'dependably' but from the adjective dependent rather than dependable.
There's a subtle difference in meaning that English captures: 'dependably' means reliably doing something, while 'dependantly' means doing something while relying on someone else—it's about the relationship between people, not the quality of action.
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