| fire and ice(expression, idiom, fundamental, shorts, undercarriage) |
| foundations(basics, practicalities) |
| fundamental(shorts, undercarriage) |
| fundamentals(basics, practicalities) |
| gravamen(fundamental, shorts, undercarriage) |
| heart(fundamental, shorts, undercarriage) |
| implantation(fundamental, shorts, undercarriage) |
| inculcation(fundamental, shorts, undercarriage) |
| innards(basics, practicalities) |
| inner workings(noun, expression, innards, essentials, basics) |
| integrant(fundamental, shorts, undercarriage) |
| lifeblood(fundamental, shorts, undercarriage) |
| name of game(expression, idiom, fundamental, shorts, undercarriage) |
| necessity(fundamental, shorts, undercarriage) |
| need(fundamental, shorts, undercarriage) |
| nitty-gritty(basics, practicalities) |
| nitty gritty(noun, expression, fundamental, shorts, undercarriage) |
| no-frills(fundamental, shorts, undercarriage) |
| no nonsense(noun, expression, innards, essentials, basics) |
| nub(fundamental, shorts, undercarriage) |