ˈ ̷ ̷ˌ ̷ ̷ noun
1. : a cemented or compacted and often clayey layer in soil that hampers root penetration and results from accumulation of cementing material or may be caused by repeated plowing to the same depth — compare plow sole
2. : a firm substantial fundamental part or quality of something : bedrock
gets down to the hardpan of the question