Suffixes:
* -ical: This suffix can be added to form adjectives related to philosophy, such as philosophical, ethical, logical, and metaphysical.
* -ist: This suffix can be added to form nouns denoting someone who practices or studies philosophy, such as philosopher, materialist, and idealist.
* -ism: This suffix can be added to form nouns representing a specific philosophical system or doctrine, such as idealism, realism, stoicism, and existentialism.
It's important to note that while these suffixes are often used in connection with philosophy, they are also used more broadly in other contexts.