v. tread, trample; press down; emphasize

nm. (Geology) limestone, sedimentary rock which contains mainly calcium carbonate

n. limekiln, furnace in which limestone or shells are made into lime

v. trace

V
tread/trample upon/under foot| crush; tamp/ram down; spurn; copulate (cock)

treading etc. v. călca
fig. infringement
fig. invasion
fig. transgression
fig. violation

(v.) = trace.
Ex: A light table is a table with a translucent screen on top illuminated from underneath, for tracing, viewing slides, etc.
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* papel de calcar = tracing paper.