Give the suffix form (be careful not to give the combining form) meaning study, science, the study or science of.

Give the suffix form (be careful not to give the combining form) meaning one who specializes in a certain study or science.

Give the suffix form (be careful not to give the combining form) meaning the narrowing of.

Give the suffix form (be careful not to give the combining form) meaning poisonous.

Give the suffix form (be careful not to give the combining form) meaning the hardening of.

Give the adjective-forming suffix which can mean pertaining to, pertaining to inflammation, or can indicate a drug or agent. Give the suffix which has antineuritic, laryingitic and arthritic as examples.