OBSTINATE ; HEADSTRONG

Explanation :-  Unreasonably determined, especially to act in a particular way and not to change at all, despite argument or persuasion:

 • Firmly adhering to one’s chosen course of action or opinion despite persuasion or argument; stubborn, self-willed 
• He can be very obstinate at times.

Medicine is :-  abrot- Acon. act-sp- Agar. alco. aloe ALUM. alum-p- alum-sil. alumn. am-c- am-m. ambr. ANAC. androc- Ant-c. ant-t- apis ARG-N. arizon~|. am. Ars. ars-s-f- arum-t. aur. aur-ar- aur-m-n- aur-s- bamb-a- bar-act- bar-c- BELL. bora-o. Bry. bufo CALC. calc-ar- calc-p- Calc-s. camph- canth. Caps. carb-an- carb—v- carbn-s. carc. Caust. CHAM. chel. Chin. chinin-s. choc- Cine  cinch- coca coloc- croc- Cmt-h. cupr- cycl- dendr-pol- dig- dros- Dulc. emb-r. ferr- ferr-ar- ferr-p. galv- guaj- hell. Hep. hura hydrog. Hyos. Ign. ignis-alc. ip- kali-ar- kali-bi- Kali-c. kali-chl. kali-i- kali-m. Kali-p. kali-s- kali-sil- kalm- kreos. lac-e. lac-f. lach. Lyc. Mag-m. Med. menis- merc. morph- mosch- mur-ac- nat-c-, nat-m- nat-sil- nicc-met. Nit-ac. NUX-V. Pall. petr. Ph-ac. phel. phos. plat- plb- positr- Prof. Psor. puls- rhus-t- ruta sanic- sec. sep. Sil. Spong. Staph. stram- Sulph. Symph. syph- TARENT. Thu]. Tub. verat. viol-o. viol-t- zinc. zinc-p-