1. With regret (used in polite formulas)
   "I must regretfully decline your kind invitation"

See also: regretful

• phylum
• phylum Acanthocephala
• phylum Annelida
• phylum Arthropoda
• phylum Aschelminthes
• phylum Brachiopoda
• phylum Bryozoa
• phylum Chaetognatha
• phylum Chordata
• phylum Cnidaria
• phylum Coelenterata
• phylum Cryptophyta
• phylum Ctenophora
• phylum Cycliophora
• phylum Echinodermata
• phylum Ectoprocta
• phylum Entoprocta
• phylum Mollusca
• phylum Nematoda
• phylum Nemertea
• phylum Nemertina
• phylum Phoronida
• phylum Platyhelminthes
• phylum Pogonophora
• phylum Porifera