[gakugakuburuburu] (vs) (on-mim) (See ガクガク, ブルブル) to tremble; to shiver (from stress, fear or panic); (figuratively) to experience a sense of stress, fear, or panic
[gakuburu] (vs) (abbr) (on-mim) (See ガクガク, ガクガクブルブル, ブルブル) to tremble; to shiver (from stress, fear or panic); (figuratively) to experience a sense of stress, fear, or panic