From the given options choose the one which is opposite in meaning to the word given below 

ROYAL

Inferior

The word that is opposite in meaning to royal is inferior.

• Royal means belonging to or associated with a king, queen, or other member of a royal family.
• Inferior means of lower rank, status, or quality.

The other options are not opposites of royal.

• Splendid means very grand, impressive, or magnificent.
• Regal means having the qualities of a king or queen; majestic.
• Imperial means of or relating to an empire or an emperor.