翻訳　日本語　英語: 必須

1 BASIC, essential, necessary, necessity, requirement, requisite, staple.

2 CORE, Centre, PIN, center, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, necessity, nitty-gritty, nub, pith, pivot, substance, sum.

3 CORE, Centre, aroma, burden, center, effect, essence, essentiality, essentialness, fragrance, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, perfume, pith, scent, substance, sum.

4 certainty, foregone conclusion, inevitable, necessity, sure thing.

5 demand, essential, fire, firing, limitation, necessary, necessity, requirement, requisite.

6 demand, essential, indigence, necessary, necessity, need, pauperism, pauperization, penury, requirement, requisite, want.

7 demand, essential, necessary, necessity, prerequisite, requirement, requisite.

8 essential, essentiality, essentialness, necessary, necessity, requirement, requisite, requisiteness.

1 all important, all-important, cardinal, central, critical, crucial, essential, fundamental, imperative, indispensable, key, momentous, of the essence, pivotal, polar, primal, substantive, vital.

2 all important, all-important, compulsory, critical, crucial, essential, indispensable, mandatory, necessary, needed, needful, of the essence, required, requisite, vital.

3 all important, all-important, compulsory, crucial, essential, imperative, indispensable, mandatory, necessary, needed, needful, of the essence, required, requisite.

4 all important, all-important, crucial, essential, important, of the essence.

5 authoritative, cardinal, central, essential, foremost, frontmost, fundamental, important, key, leading, preeminent, primal, significant.

6 basal, base, cardinal, central, critical, decisive, elemental, fundamental, imperative, key, pivotal, polar, primal, primary, rudimentary, underlying, vital.

7 basal, basic, cardinal, central, elemental, elementary, essential, fundamental, introductory, key, pivotal, polar, primal, primary, rudimentary, standard, stock, underlying.

8 basal, cardinal, central, chief, critical, fundamental, imperative, key, main, master, pivotal, polar, primal, primary, principal, vital.

9 basal, essential, first, foremost, leading, preeminent, primary, world-class.

10 basic, cardinal, central, essential, fundamental, inner, internal, intimate, key, primal, profound.

11 basic, cardinal, central, essential, fundamental, key, primal, profound, rudimentary, underlying.

12 big, critical, crucial, essential, important, large, life-sustaining, material, meaningful, of import, prominent, significant, vital.

13 binding, compulsory, mandatory, required.

14 cardinal, central, essential, fundamental, important, independent, key, large, main, major, of import, primal, proto, significant, staple.

15 certain, compulsory, mandatory, required, sure.

16 compulsory, constrained, forced, mandatory, required, strained.

17 compulsory, duty-bound, mandatory, obligatory, obliged, required.

18 critical, crucial, dangerous, decisive, essential, grave, great, grievous, heavy, important, life-threatening, major, serious, severe, significant, weighty.

19 critical, crucial, decisive, essential, imperative, important, indispensable, vital.

20 critical, crucial, decisive, essential, important, of import, significant, vital.

21 important, needed, needful, of import, required, requisite, significant.