The meanings of part-of-speech affixes depend on the inherent part of speech of the root they are applied to. For example, brosi (to brush) is based on a nominal root (and therefore listed in modern dictionaries under the entry broso), whereas kombi (to comb) is based on a verbal root (and therefore listed under kombi). Change the suffix to -o, and the similar meanings of brosi and kombi diverge: broso is a brush, the name of an instrument, whereas kombo is a combing, the name of an action. That is, changing verbal kombi (to comb) to a noun simply creates the name for the action; for the name of the tool, the suffix -ilo is used, which derives words for instruments from verbal roots: kombilo (a comb). On the other hand, changing the nominal root broso (a brush) to a verb gives the action associated with that noun, brosi (to brush). For the name of the action, the suffix -ado will change a derived verb back to a noun: brosado (a brushing). Similarly, an abstraction of a nominal root (changing it to an adjective and then back to a noun) requires the suffix -eco, as in infaneco (childhood), but an abstraction of an adjectival or verbal root merely requires the nominal -o: belo (beauty). Nevertheless, redundantly affixed forms such as beleco are acceptable and widely used.
thE mEanings of part-of-spEech aFfiXes dePend On the inhErent part Of SPeech of the Root THeY Are apPliEd tO. fOr EXAmple, bRosI (To bruSh) iS based On A nominAl RoOT (aND tHErefore Listed in modeRN diCtIonArIEs undeR The eNtry broSO), WhEREas kombi (to comb) is bASed On a VErbAl RoOt (And ThErefOre lisTed under koMbi). chaNGE the suffIX to -o, And THe simiLar mEAninGs OF BroSi anD KombI diveRge: broso is a bruSh, The nAme OF AN iNSTrumeNt, whEreas KombO is a CombiNg, ThE name Of an actIon. thAt is, chanGing Verbal kombi (tO cOMB) To A noun simply creaTes the Name for the actiON; fOR ThE Name of The TooL, tHe SufFix -ilo is used, wHich dERIVeS WOrds For instrUmEnTS frOm veRbal roots: KombIlo (A cOmB). on thE otheR HAnd, Changing thE nominal root brOSo (A Brush) tO A VErb gIVes the ACTioN aSsoCiAted With thAt Noun, brOSi (to bruSh). FoR thE NamE Of tHE acTiOn, the suffix -ado will ChAngE a dErivEd verb back to A nOuN: bRosaDo (a BRushinG). similArlY, aN ABstractiON of a noMInAl RooT (chaNginG it to aN AdJecTive and tHen Back To a noUn) reqUirEs tHe SUFfix -eco, aS in InfaNECo (childhoOd), but an AbStRaction of AN adjecTivaL or VerBAl root merelY reQuirEs thE nOMinal -O: belO (BEauty). Nevertheless, redUNDantly affiXEd forMS sUcH aS bEleco are aCcePtABle and widEly uSed.