The mother
'em  (ame)
a mother (as the bond of the family); in a wide sense (both literally and figuratively) -- dam, mother, parting.
of Sisera
Ciycra'  ()
Sisera, the name of a Canaanitish king and of one of the Nethinim -- Sisera.
shaqaph  (shaw-kaf')
to lean out (of a window), i.e. (by implication) peep or gaze (passively, be a spectacle) -- appear, look (down, forth, out).
out at a window
challown  (khal-lone')
and cried
yabab  (yaw-bab)
to bawl -- cry out.
through the lattice
'eshnab  (esh-nawb')
A latticed window -- casement, lattice.
Why is his chariot
rekeb  (reh'-keb)
a vehicle; by implication, a team; by extension, cavalry; by analogy a rider, i.e. the upper millstone -- chariot, (upper) millstone, multitude (from the margin), wagon.
so long
buwsh  (boosh)
to pale, i.e. by implication to be ashamed; also (by implication) to be disappointed or delayed
in coming
bow'  (bo)
to go or come (in a wide variety of applications)
why tarry
'achar  (aw-khar')
to loiter (i.e. be behind); by implication to procrastinate -- continue, defer, delay, hinder, be late (slack), stay (there), tarry (longer).
the wheels
pa`am  (pah'-am)
a stroke, literally or figuratively (in various applications, as follow) -- anvil, corner, foot(-step), going, (hundred-)fold, now, (this) + once, order, rank, step, + thrice, (often-), second, this, two) time(-s), twice, wheel.
of his chariots
merkabah  (mer-kaw-baw')
a chariot -- chariot.