Question

How should you pronounce “vanished” in Scene ii, line 12 in order to maintain iambic pentameter? How do you know?

CAESAR
10 Caesar shall forth. The things that threatened me
11 Ne'er looked but on my back. When they shall see
12 The face of Caesar, they are vanishèd.

Answer 1

iambic = alternating between unstressed and stressed syllables. each foot has 2 syllables.
pentameter = five feet
so

12 The face of Caesar, they are vanishèd.
the (unstressed)
face (stressed)
of (unstressed)
Cae- (stressed)
-sar (unstressed)
they (stressed)
are (unstressed)
van- (stressed)
ish- (unstressed)
èd - (stressed)

Answer 2

sounds more like "VAN is SHED"

Answer 3

Thank you! :)