Unwilling to take a chance for fear that something bad or unfavourable will happen; cowardly.
A kiasi person.
Hesitant.
That stutters.
An instance of stuttering.
A speech disorder in which the flow of speech is disrupted by involuntary repetitions and prolongations of sounds, syllables, words or phrases, and by involuntary silent pauses or blocks in which the stutterer is unable to produce sounds.