Similar words
masivo
Close — heavy and massive overlap in describing large, weighty things.
Similar in other languages
German
mühsam
mühsam is the German word for the same thing — both mean "heavy, tedious, arduous."
English
dense
Close, figuratively — heavy relates to dense.
German
bedrückend
Close, figuratively — oppressive relates to heavy, tedious (pesado).
Practice
1 What does pesado mean?
heavy; tedious
2 Fill the gap: La caja es muy ___.
Full sentence: La caja es muy pesada. (The box is very heavy.)
3 Which fingerprint chart matches pesado?
pesado: neutral register, core frequency, general domain, neutral connotation.