The Suffix -an

member of, someone belonging to:

• klub__an__o – club member
• amerik__an__o – American
• samland__an__o – fellow-countryman
• samide__an__o – fellow-supporter (of an idea: in particular, a fellow Esperantist)

The Suffix -ec

makes an abstract noun, indicating a state or quality:

• bel__ec__o – beauty
• varm__ec__o – warmth
• simpl__ec__o – simplicity

The Suffix -uj

forms the name of a container, country or plant:

• manĝ__uj__o – manger, food-trough
• cindr__uj__o – ashtray
• Franc__uj__o – France
• Aŭstr__uj__o – Austria
• pomo – apple
  • pom__uj__o – apple tree