(p. 427) ṭhana expressing a light, clattering noise as of the concussion of a thin metallic object. ঠন ঠন int. expressing this noise made repeatedly; nothingness or vacuity or emptiness (পকেট ঠনঠন). ঠনঠনে a. empty. 9)

(p. 440) ḍhuḍhu (also n.) expressing nothingness. কাজের বেলায় ঢুঢু found wanting when called upon to prove (one's) worth; of no worth or value at the time of work or crucial test. 4)