IPA: /ˈdʒɪtəriər/
KK: /ˈdʒɪtəriər/
Feeling or showing nervousness or anxiety, especially in a way that causes shaking or trembling.
After drinking too much coffee, I felt jitterier than usual during the meeting.
Comparative: jitterier
Superlative: jitteriest
'Jitterier' is formed from 'jitter' (of uncertain origin, possibly imitative of the sound of shaking) and the comparative suffix '-ier' (meaning more). The word 'jitterier' means more jittery or having more jitters than something else.
Think of 'jitter' as a word that describes shaking or nervousness, and remember that 'jitterier' means having more of that shaky feeling.