理由【りゆう】
reason, pretext, motive
管理【かんり】
control, management (e.g. of a business)
理事【りじ】
director, trustee
処理【しょり】
processing, dealing with, treatment, disposition, disposal
料理【りょうり】
cooking, cookery, cuisine, meal, food, dish, item on a menu, (easily) dealing with something, handling (well)
総理【そうり】
prime minister (as the head of a cabinet government), premier, leading, overseeing, leader, overseer, president
理解【りかい】
understanding, comprehension, appreciation, sympathy
倫理【りんり】
ethics, morals
理念【りねん】
(Platonic) ideal (of how things ought to be, e.g. human rights), foundational principle, idea, conception (e.g. of the university), doctrine, ideology
代理【だいり】
representation, agency, proxy, proxy, agent, representative, deputy, substitute, surrogate, stand-in
原理【げんり】
principle, theory, fundamental truth
心理【しんり】
state of mind, mentality, psychology
整理【せいり】
sorting, arrangement, organization, putting in order, adjustment, regulation, liquidation, settlement, consolidation, clearance (e.g. debt), paying off, retrenchment, curtailment, cutting down, disposal
理想【りそう】
ideal, ideals
理論【りろん】
theory
無理【むり】
unreasonable, unnatural, unjustifiable, impossible, forcible, forced, compulsory, excessive (work, etc.), immoderate, to work too hard, to try too hard, no way, not a chance, never, dream on, irrational
論理【ろんり】
logic
合理化【ごうりか】
rationalization, rationalisation, rationalize, rationalise
修理【しゅうり】
repair, mending, fixing, servicing
調理【ちょうり】
cooking, food preparation