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iii.) Several crude-forms ending in 'a' take 'ttu'.
Ex: urattu (= became strong), maṇattu (= smelt), kanattu
(= became heavy), balattu (= became strong).
118. What change does 'ttu' undergo after crude-forms
ending in a palatal?
After crude-forms ending in a palatal, 'ttu' changes
into 'chchu'.
i.) Among crude-forms ending in 'i'.
Ex: (iṭikka), iṭittu, iṭichchu (=bruised).
ii.) Among those ending in palatal 'a'.
Ex: (vir̥ekka), vir̥ettu, vir̥echchu (= shivered).
iii.) Among crude-forms ending in 'i, é, ei, ya'.
Ex: (chíkka), chíchchu (= became rotten); (vekka) vechchu
(=put); (keikka) (keichchu) kachchu (= was bitter); (méy-
kka), méyichchu, méchchu [= grazed (tr.)]
119. Into what is 'tu' changed after weak verbs ending in
'ṭu' r̥u and after strong verbs ending in 'ḷ','l'?
It becomes 'ṭṭu' 'r̥r̥u' respectively.
Ex: (naṭu), naṭṭu (= planted); (kéḷkka), kéṭṭu (= heard); (kaḷ-
kka) (kakka), kaṭṭu (=stole); (ar̥u), ar̥r̥u (=broke off); (vilkka),
vir̥r̥u (= sold).
120. Is 'tu' affixed to form the past tense of crude-forms
ending in nasals?
Yes; in the case of many intransitives especially 'tu'
occurs under the form of 'ntu'.
Ex: (véku), ventu (= burned); (nóku), nontu (= was painful);
(puku), pukuntu (= praised).