-in denotes Feminines: viro, a man, virino, a woman; patro, father, patrino, mother.—Ino, a female.
-ist denotes Trade, Occupation, Profession: labori, to work, laboristo, workman; kuraci, to treat (medically), kuracisto, doctor.
-nj added to the first two to five letters of a word, is used to form Feminine Diminutives of Endearment (compare [-ĉj] above): Johanino, Jane, Johanjo, Jenny; patrino, mother, panjo, mamma.
-uj denotes a Receptacle which contains or bears a Collection or a Quantity of things or material (compare [-ing] above): mono, money, monujo, purse; inko, ink, inkujo, inkstand.—Ujo, a utensil case, bin.
The suffix -uj is also used to denote Trees bearing certain fruits: pomo, apple, pomujo, apple-tree; ĉerizujo, cherry-tree; rozujo, rose-bush. The word arbo, however, is more frequently used in such cases: pomarbo, rozarbeto, etc.
-Uj is also used to denote the Names of Countries: Anglo, Englishman, Anglujo, England; Franco, a Frenchman, Francujo, France. (See [footnote 4, p. 40].)
-ul denotes a Being characterised by the Idea contained in the Root-word: bela, beautiful, belulino, a beautiful woman, a beauty; kulpo, blame, kulpulo, culprit; laŭdindulo, one worthy to be praised; bonulo, a good fellow; bonegulo, a jolly good fellow.
-um is an Indefinite Suffix, like the word je among the prepositions, Thus: pleni, to fill, plenumi, to fulfil (compare plenigi, to fill); kolo, neck, kolumo, collar; aero, air, aerumi, to air (a room, clothes, etc.).
[Words containing -um should be learnt as independent roots.]