Is a man allowed to trim his eyebrows for shalom bayis?
Answer:
As we have noted previously, if the purpose of trimming eyebrows is to avoid embarrassment, it is certainly permitted to do so.
If the purpose is for beautification, it is better to avoid the practice, though it is not prohibited if it is the way of men to trim their eyebrows (which it certainly is today to a certain degree).
For more details please see here and here.
In the case of the question, if there is a concrete issue of Shalom Bayis involved, there is room for leniency.
Best wishes.
