Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A bird's beak in a dream indicates its tongue and its speech. Its strength indicates the man's eloquence. Its breaking indicates his inability to speak.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The beak indicates knowledge and argument. Whoever sees a bird pecking him will hear words that harm him.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The beak is interpreted as a man who argues and disputes a lot. Whoever sees that his beak is long, his tongue is long with evil.