堆

to pile up / to heap up / a mass / pile / heap / stack / large amount

Tu (ethnic group) / surname Tu

earth / dust / clay / local / indigenous / crude opium / unsophisticated / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

short-tailed bird

reactor

archaeological site of Sanxingdui outside Chengdu (Sichuan), exhibiting remarkable bronze artifacts from the 11-12th centuries BC

Nathu La (Himalayan pass on Silk Road between Tibet and Indian Sikkim)

Nathu La (Himalayan pass on Silk Road between Tibet and Indian Sikkim)

to assess an entire lot

hexagonal close-packed (HCP) (math.)

power reactor

atomic reactor

atomic pile (original form of nuclear reactor)

fuel element

pile