1.
To be ~ to something, usually something bad, means to have a tendency to be affected by it or to do it.
For all her experience, she was still ~ to nerves...
People with fair skin who sunburn easily are very ~ to develop skin cancer.
ADJ: v-link ADJ, ADJ to n, ADJ to-inf
•
-~ combines with nouns to make adjectives that describe people who are frequently affected by something bad.
...the most injury-~ rider on the circuit.
COMB in ADJ
see also accident ~
2.
If you are lying ~, you are lying on your front. (FORMAL)
Bob slid from his chair and lay ~ on the floor...
? supine
ADJ: ADJ after v, ADJ n