Lacking clarity or substance; vague

अस्पष्ट या अमूर्त

English Usage: The movie had a washy plot that failed to engage the audience.

Hindi Usage: फिल्म की कहानी अस्पष्ट थी जो दर्शकों को आकर्षित नहीं कर पाई।

Something that is diluted or weak in character

कमज़ोर या पतला

English Usage: Her enthusiasm for the project was a bit washy.

Hindi Usage: उसकी परियोजना के प्रति जोश थोड़ा कमज़ोर था।