different between slavishly vs lavishly

English

slavish +? -ly

slavishly (comparative more slavishly, superlative most slavishly)

From Middle English lavausly, equivalent to lavish +? -ly.

lavishly (comparative more lavishly, superlative most lavishly)

In a lavish manner, expending profusely.
- At twilight in the summer […] the mice come out. They […] eat the luncheon crumbs. Mr. Checkley, for instance, always brought his dinner in a paper parcel in his coat-tail pocket, and ate it when so disposed, sprinkling crumbs lavishly—the only lavishment of which he was ever guilty—on the floor.

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