underpinning

下着 の訳語→ underclothes underlining underwear

基礎 の訳語→ core cornerstone foundation fundamentals plumbing roadbed substratum

基盤 の訳語→ base basis infrastructure matrix plateau

脚 の訳語→ foot leg support

支え の訳語→ crutch fulcrum rock

支持 の訳語→ acceptance advocacy auspice campaign sustainment

土台 の訳語→ institution nucleus