to amass, to collect
gromadzić majątek: to amass a fortune
to accumulate, to collect, to stock up (with)
~ się to gather, to get together
~ się wokół (kogoś/czegoś) to rally round, to crowd round/about, to congregate
 ~ w stertę to heap up
 ~ w stos to pile up
 vt imperf
1. (zbierać) to accumulate.
2. (o żywności) to lay in
to store.??~ się to gather
to assemble
 (o rzeczach) to collect
 to accumulate
 to heap up
vt to gather
to accumulate, to amass
to hoard
vr
gromadzić się -  to assemble, to gather
to gather~ dowody - to assemble the evidence~ na rachunku bankowym - to accumulate in a bank account~ się - to assemble~ sprawozdania - to compile reports
to gather, to accumulate ~ kapitał to board capital ~ majątek to amass a fortune~ pieniądze to hoard money
vt 
1. to hoard 
2. to rake in 
3. to accumulate 
3. to store ~ kapitał to board capital ~ majątek to amass a fortune ~ pieniądze to hoard money ~ zapasy to lay up stores
collect vt
GATHER
ACCUMULATE
COLLECT
HOARD
ASSEMBLE
AGGLOMERATE
CLUSTER
DRIFT
MUSTER
STORE
to collect
imperf accumulate, amass, heap up
~ się vr assemble, gather
pool
stock up, hoard
accrue
aggregate
amass
bank
congregate
convoke
cumulate
flock
glean
heap
mass
meet
rally
stockpile
treasure