Klein Dictionary, נדנד

נדנד to nag, to bore.
    — Pilp. - נִדֽנֵד NH 1 he shook, rocked; PBH 2 he caused, brought about.
    — Pulp. - נֻדֽנַד was shaken, was rocked.
    — Hithpalp. - הִתְנַדְנֵד PBH 1 was moved, was shaken, he rocked, seesawed; NH 2 he became a bore; NH 3 he nagged, was a bore, was a ‘nudnik’ (influenced in meaning by Yiddish nudnik).] [Pilp. of נוד (= to move).] Derivatives: נַדְנֵדָה, נַדְנוֹד, נִדְנוּד, הִתְנַדְנְדוּת.