# The Lord Yahweh says this

"I, the Lord Yahweh, say this". Yahweh speaks to Ezekiel, reminding him and the people that what he is saying is important. 

# Lord Yahweh

See how you translated this in Ezekiel 2:4.

# Clap your hands and stomp your foot

Ezekiel was to do this symbolic action to get the people's attention. This was not applause.

# Alas

This word is spoken by those who see people doing bad things and realize bad things will happen to the evildoers.

# the house of Israel

"the Israelites" or "the Israelite people group". See Ezekiel 3:1.

# they will fall by sword, famine, and plague.

This refers to soldiers who kill people using swords.