a trill is a form of:

Trill



noun
1.
(1. A fluttering or tremulous sound, as that made by certain birds; a warble. 2. Music. a. The rapid alternation of two tones either a whole or a half tone apart. b. A vibrato. 3. Linguistics. A rapid vibration of one speech organ against another) សូររលាក Phonetic. Spanish 'rr' is a trill សូរកើតឡើងដោយរលាស់អណ្ដាតយ៉ាងញាប់
verbpast tense: trilled ; past participle: trilled ; present participle: trilling ;
1.
(TRANSITIVE) (to flow in a thin stream or in drops rapidly succeeding each other, to trickle) trill a flute ធ្វើអោយមានសូររលាក trill your's បន្លឺដោយរលាស់អណ្ដាត
ENGLISH MEANING
noun
1.
A sound, of consonantal character, made with a rapid succession of partial or entire intermissions, by the vibration of some one part of the organs in the mouth -- tongue, uvula, epiglottis, or lip -- against another part; as, the r is a trill in most languages.
2.
The action of the organs in producing such sounds; as, to give a trill to the tongue. d
3.
A shake or quaver of the voice in singing, or of the sound of an instrument, produced by the rapid alternation of two contiguous tones of the scale; as, to give a trill on the high C.
verbpast tense: trilled ; past participle: trilled ; present participle: trilling ;
1.
(INTRANSITIVE) To flow in a small stream, or in drops rapidly succeeding each other; to trickle.
2.
(TRANSITIVE) To turn round; to twirl.
3.
(TRANSITIVE) To impart the quality of a trill to; to utter as, or with, a trill; as, to trill the r; to trill a note.
4.
(INTRANSITIVE) To utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.