Look-up History
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Show words looked up
Word |
# |
Date |
Definition |
Site |
Level |
| sudden |
1 |
today |
happening without notice or warning; not expected. [2 definitions] |
Main |
Int. |
| geology |
1 |
today |
the study of the physical structure of the earth and how it has changed over time. Geologists gain this knowledge by studying rocks. Some geologists study other planets. [2 definitions] |
Main |
Int. |
| persistent |
1 |
today |
continuing, lasting, or holding on in a firm, steady way. [2 definitions] |
Main |
Int. |