elusive

Synonyms: ambiguous baffling cagey deceitful deceptive difficult to catch elusory equivocal evanescent fallacious fleeting fraudulent fugacious fugitive greasy illusory imponderable incomprehensible indefinable insubstantial intangible misleading occult phantom puzzling shifty shy slippery stonewalling subtle transient transitory tricky unspecific volatile

Antonyms: attracting confronting encountering enticing facing inviting