Ma'anar ƙamus na kalmar "bound form" yana nufin ra'ayi na harshe a cikin ilimin halittar jiki, wanda shine nazarin tsarin kalma. A bound form is a morpheme, wanda shine mafi ƙarancin ma'ana na harshe, wanda ba zai iya tsayawa shi kaɗai a matsayin kalma mai zaman kanta amma dole ne a haɗa shi da wani nau'in morpheme don isar da ma'ana. prefixes ko suffixes, waɗanda aka ƙara zuwa tushe ko tushen morpheme don ƙirƙirar sabuwar kalma ko gyara ma'anarta. Misali, prefix "un-" a cikin kalmar "rashin farin ciki" wani nau'i ne mai ɗaure saboda ba zai iya aiki a matsayin kalma da kansa ba amma yana canza ma'anar ma'anar morpheme "mai farin ciki" lokacin da aka haɗe shi. p> An bambanta nau'ikan daure da nau'i na kyauta, waɗanda suke morphemes waɗanda zasu iya aiki da kansu azaman kalmomi daban. Misalin nau'i na kyauta shine kalmar "cat," wanda baya buƙatar ƙarin morpheme don bayyana ma'anarsa. a haɗe zuwa wani morpheme don bayyana ma'ana.