פירוש על ברכות 113:11

Tarnegol "hen" suggests the interpretation that follows.

Rashi explains that while the egg-shell remains unbroken, one is doubtful of its contents. Pinner suggests that the interpretation may be due to resemblance between the Aramaic words for "egg" and "petition"; and as when the egg is broken it is finished with, that suggests a petition granted. The Rev. A. Newman writes, "A spherical body, like an egg, cannot stand firm. Hence, as the egg is unstable, so is the fulfilment of the petition uncertain."