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hierarchies▼noun[UK: ˈhaɪə.rɑːkɪz] [US: ˈhaɪ.ˌrɑːrkiz]
hierarchy [hierarchy]▼(body of authoritative officials organised by rank)noun[UK: ˈhaɪə.rɑːk.i] [US: ˈhaɪə.ˌrɑːrk.i]
bottom-up▼adjective
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