Each group of three definitions describes three words that are spelled the same, except for one letter (each group describes a different set of words). Example: king, ring, wing.
1a) inexperienced
1b) to address with expressions of kind wishes
1c) unreasonable selfish desire
2a) highly skilled
2b) to conform
2c) to accept formally and put into effect
3a) a committee for judging and awarding prizes
3b) conceal or hide
3c) violent anger
4a) a rounded shape
4b) spoken
4c) a gemstone