IPA: /ˈsʌni/
KK: /ˈsʌni/
Bright and cheerful, often because of the presence of sunlight.
The weather was sunny, perfect for a picnic in the park.
Comparative: sunnier
Superlative: sunniest
Sunny → The word is formed from "sun" (from Old English *sunne*, meaning the star that provides light and warmth) and the suffix "-y" (meaning characterized by or full of). Thus, "sunny" describes a condition characterized by the presence of sunlight.
Think of the 'sun' shining brightly, and remember that 'sunny' means full of sunshine.