あらたまった (translations)→ formal polite serious
うやうやしく (translations)→ civilly politely reverently
きまじめに (translations)→ dutifully humorlessly straight
こっくり (translations)→ brisk dumbly sympathetically
しかつめらしく (translations)→ portentously primly solemnly
ぼそりと (translations)→ forlornly quietly
まじめくさって (translations)→ earnestly stern
もったいぶった (translations)→ confiding haughty oracular portentous reluctant smug stilted stuck-up superior theatric
もったいぶって (translations)→ deliberate deliberately significantly stuffily
よほど (translations)→ appalling certainly comfortable considerably damned deeply definitely far long more most much particularly pretty progressively quite real really so sufficiently very
真顔で (translations)→ dryly frankly genuinely intently judiciously seriously
神妙な (translations)→ meek reverence
物々しく (translations)→ importantly majestically
