/ kənˈsɪdərəbl; NAmE / adjective
( formal ) great in amount, size, importance, etc.
SYN significant :
The project wasted a considerable amount of time and money.
Damage to the building was considerable.
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WORD ORIGIN
late Middle English (in the sense capable of being considered ): from medieval Latin considerabilis worthy of consideration, from Latin considerare examine, perhaps based on sidus , sider- star.