Sanskrit, Malayalam adds an additional /m/, e.g. "Brahma" (neuter nominative singular of "Brahman") becomes "Brahmam". This is again omitted when forming compounds. Words whose roots end in /-an/ but whose nominative singular ending is /-a-/ (for example, the Sanskrit root of "karma" is actually "karman") are also changed. The original root is ignored and "karma" (the form in Malayalam being "karmam" because it ends in a short /a/) is taken as the basic form of the noun when declining. However, this does not apply to all consonant stems, as "unchangeable" stems such as "manas" ("mind") and "suhr̥t" ("friend") are identical to the Malayalam nominative singular forms (although the regularly derived "manam" sometimes occurs as an alternative to "manas"). Sanskrit words describing things or animals rather than people with a stem in short /a/ end with an /m/ in Malayalam. For example,"Rāmāyaṇa" → "Rāmāyaṇam". In most cases, this is actually the same as the Sanskrit accusative case ending, which is also /m/ (or, allophonically, anusvara due to the requirements of the sandhi word-combining rules) in the neuter nominative. However, "things and animals" and "people" are not always differentiated based on whether or not they are sentient beings; for example, "Narasimha" becomes "Narasiṃham" and not "Narasiṃhan", whereas "Ananta" becomes "Anantan" even though both are sentient. This does not strictly correspond to the Sanskrit neuter gender, as both "Narasiṃha" and "Ananta" are masculine nouns in the original Sanskrit. Nouns with short vowel stems other than /a/, such as "Viṣṇu", "Prajāpati" etc. are declined with the Sanskrit stem acting as the Malayalam nominative singular (the Sanskrit nominative singular is formed by adding a visarga, e.g., as in "Viṣṇuḥ") The original Sanskrit vocative is often used in formal or poetic Malayalam, e.g. "Harē" (for "Hari") or "Prabhō" (for "Prabhu" – "Lord"). This is restricted to certain contexts – mainly when addressing deities or other exalted individuals, so a normal man named Hari would usually be addressed using a Malayalam vocative such as "Harī". The Sanskrit genitive is also occasionally found in Malayalam poetry, especially the personal pronouns "mama" ("my" or "mine") and "tava" ("thy" or "thine"). Other cases are less common and generally restricted to the realm of Maṇipravāḷam. Along with these tatsama borrowings, there are also many tadbhava words in common use. These were incorporated via borrowing before the separation of Malayalam and Tamil. As the language did not then accommodate Sanskrit phonology as