in a manful manner; with qualities thought to befit a man; "having said her say Peggy manfully shouldered her burden and prepared to break up yet another home"
air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water
something that causes or entails suffering; "I cannot think it a hardship that more indulgence is allowed to men than to women"- James Boswell; "the many hardships of frontier life"