اِنْكَمَشَ: تَقَبّضَ، تَقَلّصَ، تَجَعّدَ to contract; to shrink; to deflate; to wrinkle, become wrinkled

اِنْكَمَشَ خَوْفًا إلخ to cower, cringe, shrink (away) , recoil within oneself

اِنْكَمَشَ على نَفْسِهِ to introvert, withdraw within oneself; to be reserved, shy