undisguised
/ˌʌndɪsˈɡaɪzd ˌअन्डिस्ˈगाइज़्ड्/ adj. (used especially about a feeling) clearly shown and not hidden from other people (विशेषकर भावनाओं के लिए प्रयुक्त) स्पष्ट (छुपा नहीं) निश्छल; खुला, प्रकट; अप्रच्छन्न
There was a look of undisguised admiration on his face.