The following video demonstrates each syllable of the pinyin structure
and the exercise of pinyin/zhuyin with basic Chinese 4-tune pronunciation

Mandarin pinyin tunes
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

dūn, dún, dǔn, dùn

first tune

dūn

squat; crouch down 蹲 dūn

squat down 蹲下 dūn xià
squat 蹲 dūn	down 下 xià

amicability; harmonious 敦 dūn

good-natured; honest and sincere 敦厚 dūn hòu
amicability 敦 dūn	kind 厚 hòu

Chinese characters also pronunced dūn

third tune

dǔn

drowse 盹 dǔn

doze off 打盹 dǎ dǔn
make; issue 打 dǎ	drowse 盹 dǔn

Chinese characters also pronunced dǔn

fourth tune

dùn

shield (weapon) 盾 dùn

contradiction 矛盾 máo dùn
spear 矛 máo	shield 盾 dùn

stew 燉 dùn

stewpot 燉鍋 dùn guō
stew 燉 dùn	pot 鍋 guō

flee; escape 遁 dùn

seclusion; live in seclusion 遁世 dùn shì
escape 遁 dùn	world 世 shì

pause; immediately 頓 dùn

halt; pause 停頓 tíng dùn
stop 停 tíng	pause 頓 dùn

enlightened instantly instant realisation 頓悟 dùn wù
immediately 頓 dùn	realize; enlighten 悟 wù

Chinese characters also pronunced dùn