1. One thing at a time
   - bit-by-bit, piecemeal, step-by-step, stepwise

See also: gradual

• periphrastically
• Periplaneta
• Periplaneta americana
• Periplaneta australasiae
• periplasm
• periplasmic space
• Periploca
• Periploca graeca
• peripteral
• perique
• perirhinal
• periscope
• periscopic
• periselene
• perish
• perishability
• perishable
• perishableness
• perisher
• Perisoreus
• Perisoreus canadensis
• Perisoreus canadensis capitalis
• perisperm
• perissodactyl
• perissodactyl mammal