肥厚
Noun
Irregular
Intransitive
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suruintransitive verb
medicine
thickening (of organic tissue, e.g. skin);hypertrophy
刺激を受け続けると肌の保護作用により角質が肥厚して、ゴワゴワしたり硬くなって、毛穴が目立ってきます。
If it continues to be stimulated the skin's protective function causes thickening and it becomes stiff and hard with pores that stand out.