Tending adverbs are provided in this article. The words listed here are commonly found along with the verb tending in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb TENDING.
apparently, carefully, constantly
continually, directly, evidently
gradually, greatly, inevitably
manifestly, naturally, necessarily
perpetually, rapidly, steadily
strongly, surely
Hope this word list had the tending adverb you were looking for. In addition to adverbs used with tending, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.