What are the four demonstrative adjectives that begin with th?

Some nouns that begin with TH are:

• thatch
• theatre
• theme
• theology
• theory
• thermometer
• thickness
• thigh
• thimble
• thing
• thirst
• thistle
• Thomas
• thong
• thorn
• thought
• thrasher
• threat
• three
• throat
• thug
• thunder