> as lemmas
back-fill
back-fill v. 
/ˈbakfɪl/,
Brit. /ˌbakˈfɪl/
, /ˌbakˈfɪl//ˈbakfɪl/U.S. /ˈbækˌfɪl/
(1651 in Dict. Older Sc. Tongue)/ˈbækˌfɪl/ΘΚΠ
society > occupation and work > industry > earth-moving, etc. > [verb (transitive)] > fill in earth
to cover in1819
back-fill1930
1930 Engineering 29 Aug. 259/2 The trenches have to be backfilled with sand, gravel or other good clean earth.
1955 Archit. Rev. 118 393/3 Mineral operators, when they have finished extraction, are generally free to backfill without planning consent.
backfill
backfill n.
Brit. /ˈbakfɪl/
, /ˈbakfɪl/U.S. /ˈbækˌfɪl/
excavated earth, etc., used in backfilling./ˈbækˌfɪl/ΘΚΠ
society > occupation and work > materials > raw material > earth > [noun] > for building or constructing
back-cutting1842
wichert1912
pisé de terre1919
backfill1934
1934 Webster's New Internat. Dict. Eng. Lang. Backfill.
1975 Daily Tel. 16 Dec. 2/4 Excavated Materials:..used as backfill to foundations and bases in lieu of hardcore.
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