The word that answers the two clues below is a heteronym. That is, it's a word  - the same word - that is pronounced two distinctly different ways and has two distinctly different meanings.

1. Batty, silly, scatter-brained
2. Dark, gloomy, drab, shabby

Answers:

1. DINGY (pronounced with a hard G)*
2. DINGY (pronounced with a soft G)

*Not to be confused with DINGHY - a small boat. DINGY (with a hard G) and DINGHY are homophones - two words that are pronounced the same, but spelled differently.)