着呢 is a colloquial suffix used after adjectives to emphasize a high degree, often with an exclamatory or exaggerated tone (e.g. 'very much', 'extremely'). In modern Mandarin it is typically pronounced as 'zhe ne' (two syllables), but this dictionary entry lists the single-syllable 'zhāo' — a historical or dialectal variant. It always attaches directly to an adjective without a break, and the sentence usually ends with a final tone.