godan ~ぐ verb / transitive:

• to stop up; to close up; to block (up); to plug up; to shut up; to cover (ears, eyes, etc.); to close (eyes, mouth)
• to stand in the way; to obstruct
• to occupy; to fill up; to take up
• to perform one's role; to do one's duty

godan ~ぐ verb / intransitive verb:

• to feel depressed; to be in low spirits; to mope ➜ 鬱ぐ【ふさぐ】