suffix

syn.
synonym (or synonymous with)

v.
verb (may be transitive or intransitive)

var.
variant

vi.
intransitive verb

vt.
transitive verb

Where alternate spellings or pronunciations are given, alt. separates
two possibilities with nearly equal distribution, while var. prefixes
one that is markedly less common than the primary.

Where a term can be attributed to a particular subculture or is known
to have originated there, we have tried to so indicate. Here is a list
of abbreviations used in etymologies:

Amateur Packet Radio
A technical culture of ham-radio sites using AX.25 and TCP/IP
for wide-area networking and BBS systems.

Berkeley