inroad /inˈrōd/

1. An incursion into an enemy's country
2. A raid
3. Encroachment

make inroads into

1. To make progress with
2. To use up large quantities of

• undergoes
• undergoing
• undergone
• undergown
• undergowns
• undergrad
• undergrads
• undergraduate
• undergraduates
• undergraduateship
• undergraduette
• undergraduettes
• underground
• undergrounds
• undergrove
• undergroves
• undergrown
• undergrowth
• undergrowths
• underhand
• underhanded
• underhandedly
• underhandedness
• underhandednesses
• underhands