Chummy

Part of speech: adjective

Pronunciation: /ˈt͡ʃʌ.mɪ/

Definitions

1. Having a warm, friendly, and sociable attitude toward others ; showing an overly familiar or informal manner that may seem excessive
2. Behaving in a congenial and amicable way with others ; marked by an intimacy that can appear presumptuous or improper
3. Displaying pleasant friendliness and ease in social interaction ; characterized by an intimate or familiar approach that might be regarded as intrusive

Etymology: Chummy is a plain formation: the noun "chum" with the suffix "-y" attached, producing an adjective meaning friendly with others. The base noun "chum" (a close companion or roommate, especially at school or university) is the older word, and the suffix turns it into a description of someone who behaves like one. Adding "-y" to a noun to describe a quality or manner is one of the most productive patterns in English, which is why "chummy" sits comfortably beside words like "matey" or "bossy".

Synonyms: friendly, sociable, affable

Antonyms: hostile, unfriendly