How to Made a Verb From a Noun ?

1. lengthen

1. to make or become dark or darker
2. to become longer or to make something longer
3. to make or become bright or brighter
4. to become stronger or to make somebody or something stronger

2. strengthen

1. to untie or make looser
2. to make or become dark or darker
3. to make or become sharp or sharper
4. to become stronger or to make somebody or something stronger

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