Freddy07
at 2017-07-02 04:24:57 UTC
Those Kanji have the same meaning.
Starting with 干 is the most common way to write this word.
Using 乾 is also correct but less common.
If you take a closer look most dictionary entries list different ways to write the words.
Here's random example with 5 different Kanji.
http://jisho.org/word/%E6%B3%A8%E3%81%90
Btw you are misusing the word compound.
jakobd2
at 2017-07-02 14:13:24 UTC
OP is probably talking about 関与 from the 干 kanji listing, not 乾す. But, eh, not so sure what they mean. Jisho.org itself calls stuff like 干す a "Kun reading compound" btw.
Kimtaro Admin
at 2017-08-10 23:42:04 UTC
This looks like a possible error. I'll investigate.
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Similar apparent problem
In the listing for 干す (ほす) there is a compound that doesn't use the character 干.