A suffix attached to adjectives or verb stems to describe an outward appearance or air of an emotion or state — 'seeming,' 'looking,' or 'with an air of.' It turns the word into a な-adjective describing how someone or something appears to an observer. It is somewhat literary and often used for emotions.
[い-adj (drop い)] / [な-adj stem] / [Verb ます-stem] + げ
子供が寂しげに窓の外を見ていた。
Kodomo ga sabishige ni mado no soto o mite ita.
The child was gazing outside the window with a lonely air.
寂しい → 寂しげ = showing signs of loneliness, used adverbially with に
彼は自信ありげに笑った。
Kare wa jishin arige ni waratta.
He smiled with an air of confidence.
ある + げ = looking as if he has (confidence)
彼女は何か言いたげな表情をしていた。
Kanojo wa nanika iitage na hyoujou o shite ita.
She had a look as if she wanted to say something.
言う (ます-stem 言い) + たい → 言いたげ = looking like she wants to say
• Conjugates as a な-adjective: 寂しげな顔, 寂しげに話す. • Common with emotion words: 悲しげ, 楽しげ, 満足げ, 不安げ. • With たい it becomes ~たげ (言いたげ = looking like wanting to say).
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones ~げ is tested against.
~そう describes an appearance/guess broadly (おいしそう); ~げ specifically conveys an outward air of an emotion and is more literary, describing how a person seems to feel.
らしい reports hearsay or typical-ness; げ describes a visible impression of feeling given off by the subject.
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