Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
non-dum, adv., not yet: nondum sex menses, Plaut. Pers. 1, 3, 57: nondum centum et decem anni sunt, cum, etc., Cic. Off. 2, 21, 75: nondum Voconiā lege latā, id. Rep. 3, 10, 17; id. Div. 2, 6, 16: nondum Ilium et arces Pergameae steterant, Verg. A. 3, 109 al.: si nondum, Cic. Sest. 7, 17.